In the following question, select the related number from the given alternatives :

256 : 290 : : 961 : ?

256 = 16 × 16

290 = 16 × 16 + 16 × 2 + 2

290 = 256 + 34

Similarly,

31 × 31 = 961

gaja ? = 31 × 31 + 31 × 2 2

gaja ? = 961 + 64 = 1025