Hii Mousumi, 

As you not mentioned any university name here , for which university entrance papers you need  . Here some sample paper link given below - https://www.google.com/url?sa=t&source=web&rct=j&url=https://studychacha.com/discuss/256566-sample-question-papers-msc-botany-entrance-exam.html&ved=2ahUKEwiE7ITJo8PjAhXnIbcAHfOTCsoQFjAQegQIAxAB&usg=AOvVaw3TANnPbuzqS6I6Y_kZDtfS.

hope it help!!!