Q34

Consider a processor that has $16$ general purpose registers and it uses $2$-byte instruction format for all its instructions. Variable-sized opcodes are permitted. There are three different types of instructions; M-type, R-type, and C-type. Each M-type instruction has $2$ register operands and a $6$-bit immediate operand. Each Rtype instruction has $3$ register operands. Each C-type instruction has a register operand and a $6$ -bit offset value. If there are $2$ unique M-type opcodes and $7$ unique R-type opcodes, which one of the following options gives the maximum number of unique opcodes possible for C-type instructions?