Unfortunately, it's highly unlikely that you can pursue an MSc Hons in Botany from Delhi University with a BSc General from IGNOU, due to the following reasons:

1. Specific Subject Requirement: Most MSc Botany programs, especially at prestigious universities like Delhi University, require a strong foundation in Botany at the undergraduate level. A BSc General degree, which covers a broader range of subjects, might not meet the specific subject requirements.

2. Entrance Exam: Delhi University often conducts entrance exams for its postgraduate programs. ¹ The syllabus for these exams is usually based on the undergraduate Botany curriculum. A BSc General background might put you at a disadvantage.

If you're keen on pursuing Botany at the postgraduate level, consider the following options:

1. Bridge Courses or Diploma Programs: Some universities or institutions offer bridge courses or diploma programs to prepare students with general science backgrounds for postgraduate studies in specific subjects like Botany.
2. Other Universities: Explore other universities that might have less stringent entry requirements for MSc Botany.
3. Distance Learning Options: Consider pursuing an MSc in Botany through distance learning mode, which might have different eligibility criteria.
   
   

I hope this information helps you.