Ratio of change in the price of a call option to a

If 60 [15] 3 and 108 [63] 7, then what is the value of A in 156 [A] 16?

Select the option that is related to third number-cluster in the same way first number cluster is related to second number-cluster.

86 : 28 :: 75 : ?

Select the set in which the numbers are related in the same way as are the numbers of the following sets.

Statements: N > U < I ≤ R < D < A; K ≥ O = G > X = E > A

Conclusions:

I. R < E

II. K > D

III. U ≥ X

Select the option in which the letters share the same relationship as that shared by the given pair of letters. 

LV : PZ

In the following question, select the related word from the given alternatives.

QC : VX : : KU : ?