In each of the ing question select the one which is different from other alternatives.

Options

A. `(25,49) `
B. `(121,169)`
C. `(7,169)`
D. `(9,25)`

Answer

C

Explanation

Except in the number pair (7,169) in the other number pairs both the numbers are perfect squares.
`(25, 49) implies [(5) ^(2), (7) ^(2)]`
`(121, 169)implies [(11) ^(2) , (13) ^(2) ]`
`(9, 25) implies [(3) ^(2), (5)^(2) ]`