SSC CHSL 6 Mar 2018 Shift 3 Paper

Expression = 31: 42:: ?: ?
The difference between the first and second number is 11. Among the options,
(A) : 64 - 53 = 11
(B) : 59 - 47 = 12
(C) : 73 - 61 = 8
(D) : 44 - 34 = 10