QUESTION $13$

The instruction MOV DS$,0124$ is not a valid instruction because:

a$.$

The segement register is $16-$bits and the operand is larger than $16-$bit

b$.$ To move information to the segment registers, the data must first be moved to a general$-$purpose register, then to the segment register

c$.$ The operand should be bracketed

d$.$ The operand must first be placed in the CS register before moving it to the DS register