What Value of Z (Atomic Number)and a (Mass Number)result in the Following

Multiple Choice

What value of Z (atomic number) and A (mass number) result in the following gamma decay? $${ } _ { 6 } ^ { 12 } \mathrm { C } \rightarrow { } _ { z } ^ { A } \mathrm { X } + \gamma$$

A) Z = 5;A = 12
B) Z = 4;A = 8
C) Z = 7;A = 12
D) Z = 6;A = 12
E) Z = 6;A = 11