1.  Choose the best alternative.
48 : 122 : : 168 : ?

A. 215
B. 225
C. 290
D. 292

Answer: Option C

Explanation:

The relationship is (x²-1) : [(x+4)²+1]. Since 168=(13)²-1, so required number=(13+4)²+1=(17)²+1=290.