The control field of 1-address control word has to support 2 groups of control signals.In the group-1 it is requires to generate either 1 or none of the 63 control signals.In the group-2 at most 4 from the remaining.What will be the minimum no. bits needed for control field.
option (A) 6
option (B) 10
option (c) 67
option (D) 81.