Correct option is A
Given:1. Aman is 7th from the left.2. Sumit is 8th from the right.3. There are 5 boys between Aman and Sumit.Let the total number of boys in the row be N.Position of Sumit from the left=N−7(Since Sumit is 8th from the right)The difference between Aman and Sumit’s positions is (N−7)−7=5+1=6.So, N−14=6=>N=20.Therefore, the total number of boys in the row is 20.