All 105 students in a class are standing in a row facing north. Ravi is 49th from the right end while Shruti is 38th from the left end. How many people stand between Ravi and Shruti?

Given: 

All 105 students in a class are standing in a row facing north.

Ravi is 49th from the right end while Shruti is 38th from the left end.

Solution: 

Total = 105

Ravi is 49th from the right.
So from the left: 105 - 49 + 1 = 57

Ravi = 57th from the left

Shruti = 38th from the left

Distance between them: 57 - 38 = 19

Number of students between them = 19 - 1 = 18

So, 18 people stand between Ravi and Shruti.

Thus, correct option is (d).