Hi!
The top colleges offering B.Sc Botany are:
1. Hindu College, New Delhi
2. Miranda House, New Delhi
3. Hansraj College (HRC), New Delhi
4. Fergusson College, Pune
5. Ramakrishna Mission Vivekananda Centenary College Rahara (RKMVCC)
6. Kirori Mal College (KMC)
7. St. Xavier's College, Mumbai
8. Ramjas College, New Delhi
9. Sri Venkateswara College - Delhi
10. Deen Dayal Upadhyaya College, New Delhi
For further information, please refer to this link: https://www.careers360.com/courses/botany-course
Hope this helps.
Best wishes