Both courses are good and are in demand. The opportunities and faster growth are not so much within the type of degree, as it is within the individual who has the degree. Opportunities are always there. It is up to you to take advantage of them through creative and critical thinking, assertiveness, perseverance, commitment, positive attitude, and the ability to think through long-term benefits. Best is subjective term. What is best for me can not be best for you or vice-versa. Identify your actual interests, aptitudes, strengths, and weaknesses and match it with the choices you have to shortlist the apt one for you.
Best colleges to pursue Microbiology are:
Lovely Professional University
Bharath University, Chennai
Devi Ahilya Vishwavidyalaya
Jiwaji University, Faculty of Sciences & Faculty of Life Sciences
Delhi University
Christian Medical College, Vellore
You can do biotechnology related courses from:
University of Hyderabad-School of Life Sciences, University of Mumbai-Institute of Chemical Technology, National Dairy Research Institute 
Rajiv Gandhi Center for Biotechnology 
Lovely Professional University 
Delhi Technological University-Department of Biotechnology, Indian Institute of Technology-Department of Biochemical Engineering & Biotechnology, Delhi University
Banaras Hindu University
Jawaharlal Nehru University 
Aligarh Muslim University of Mumbai
VIT, BITS.

• SPA Delhi
• JJ School of arts and Architecture
• IIT Kharagpur
• CEP ahemdabd
• Sushant school of art and Architecture Gugaon
• Chandigarh college of Rchitecture
• Guru Nanak Dev Universty Pubjab
• IIT roorkee
• Rizvi colleges of architecture
• RVCOE

• Columbia University
• Universty of California
• Universty of Sheffield
• Cornell University
• Glasgow school of Art
• Edinburgh school of Architecture

You can check the top universities below which provide Mechatronics course

National Institute of Technology Karnataka, Surathkal

VIT University, Vellore

SRM University, Chennai

Guru Gobind Singh Indraprastha University, Delhi

Manipal Institute of Technology, Manipal

Thapar University, Patiala

Lovely Professional University, Phagwara

SASTRA University, Thanjavur

To check the complete list you can also refer below link

https://engineering.careers360.com/colleges/list-of-be-btech-in-mechatronics-engineering-colleges-in-india

Good Luck!!

The cut off and admission criteria vary college to college like if you want to join colleges under Delhi University then the seats are filled on the basis of 12th merit and if you go for Banaras Hindu University,Christ University then the admissions are done on the basis of their entrance tests. 

To know more about above said universities, you can go for the below links -

https://university.careers360.com/articles/du-cutoff

https://christuniversity.in/commerce-and-management/commerce/bachelor-of-commerce-(bcom)/1109

https://university.careers360.com/articles/bhu-uet

Also, there are many colleges available in India so it would be good if you could tell which particular state you are interested in?

Good Luck!!!

• Vit vellore
• Reva Bangalore
• Srm chennai
• IiSc Bangalore
• Ms Ramaih Banaglore
• Bms college of engineering

Hey

Here is the list of colleges with their cutoffs(avg. GRE Score):

1  MIT  166

2  Stanford  167

3  University of California - Berkeley  165

4  California Institute of Technology  169

5 (tie)  Carnegie Mellon  166

5 (tie)  University of Michigan - Ann Arbor  166

7  Georgia Institute of Technology  164

8  Purdue University  164

9 (tie)  University of Illinois - Urbana-Champaign  164

9 (tie)  University of Texas - Austin  165

Source: https://magoosh.com/gre/2013/gre-scores-for-engineering-programs/

Hi,

The list will be quite long. However good universities in Karnataka can be Manipal University, Mysore University, Visvesvaraya, Kuvempu, Bangalore etc. Mind you this is not in any specific order. Check this - https://engineering.careers360.com/colleges/ranking/2017/top-engineering-colleges-in-karnataka. You will get a better idea of the college rankings from here. 

Geology is the branch of science that deals with the study of the earth and its substances. Geology also involves the study of related areas like environment, history of earth, minerals. There are many colleges some of them I am providing you given below you can prefer:

BHU

Delhi University

Aligarh Musilm University

Jamia Millia Islamia

Good Luck!