Hey Kush,

INPhO is conducted by Homi Bhabha Center of Science Education every year. Its is the second stage of a International Physics Olympiad. So for INPhO you first have to Qualify National Standard Examination in Physics (NSEP). You have must score more than 50% of the average of the top ten scorers in NSEP to qualify for INPhO. Unfortunately you missed the opportunity this year as NSEP is conducted in the month of  November.

For NSO you have 50 questions in total and 3 sections:

1 Physics & Chemistry - 25 questions 1 mark each

2 Achievers Section - 5 questions 3 marks each

3 Maths/ Bio - 20 questions 1 mark each.

The Exam was conducted in the month of November.

You can try for INPhO, RMO, Junior Science Talent Search Examination, IMO etc..

All the Best.