In the following question, se lect the related number from the given alternatives
50 : 65 :: 122: ?

Options

A. 157
B. 145
C. 147
D. 155

Answer

B

Explanation

`(2) 50= (7)^(2) +1`
` 65 = (8) ^(2) +1`
Similarly,
`122 =(11)^(2) +1`
`=144 + 1= 145`