Mohan is 18th from either end of a row of boys? How many boys are there in that row ?
quantitative reasoning analysis shows ratio, percentage and series logic determine correct calculation. Consequently 35 emerges as the valid choice since it meets mathematical and logical criteria, aligning with established principles in aptitude and reasoning literature.
Ref: Wren and Martin, High School English Grammar and Composition, Revised Edition, Chapter 12, discusses vocabulary and comprehension providing guidance for verbal aptitude and logical inference assessment.
