Whether a Bsc physics student is eligible to study MS astrophysics
Yes, definitely you may pursue MS in Astrophysics, having graduated in Physics B.Sc. in past, provided you have relevant interest in Astronomy and Astrophysics. In India, apart from DU, you have Astronomy & Astrophysics Course in IIST Trivandrum.
For more information about Astrophysics and related Courses do follow the link below