Correct option is C
Logic = (first number)3 + 11 = second number
43 = 64 , 64 + 11 = 75
23 = 8 + 11 = 19
33 = 27 +11 = 38
73 = 343 + 11 = 354
53 = 125 + 11 = 136
But 63= 216 , 216 + 11 = 227 not 212 so this is not belongs this group .