Select the option that is related to the sixth number in the same way as the first number is related to the second number and the third number is related to the fourth number.

34 : 12 :: 28 : 16 :: ? : 15

35

34 : 12 :: 28 : 16 :: ? : 15

THE LOGIC;

1) 34 : 12,

3 x 4 = 12

2) 28 : 16,

2 x 8 = 16

Similarly,

? : 15,

a x b = 15

3 x 5 = 15

(we took 3rd first and 5th second as per the options given)

Thus, 35 is correct.