Correct Answer - Option 2 : 51
Position of Ramu from the left end = 11th
Position of Ramu from the right end = 41st
Therefore , total number of students = Position from left end + Position from right end - 1
= 11 + 41 - 1
= 52 - 1
= 51
So, there are 51 students in the class.
Hence, option 2 is the correct answer.