Correct option is A
Given:
Manju's rank from top = 8
Manju's rank from bottom = 17
Manju's rank from bottom = 17
Logic: Total students = Rank from top + Rank from bottom - 1

Total students = 8 (from top) + 17 (from bottom) - 1
= 25 - 1
= 25 - 1
= 24
Thus, the correct option is (a) 24.