1.  Which one will replace the question mark ?

A. 1/2
B. 2/3
C. 3/4
D. 4/5

Answer: Option D

Explanation:

From I row, 1 + (1/2) = 3/2

From II row, 2 + (2/3) = 8/3

From III row, 3 + ? = 19/5

? = (19/5) - 3

? = (4/5).