# CO-Test 2-Question 5

In the following based scaled indexed addressing mode with displacement instruction,

$ADD\ EAX [(10[R_{IDX}])], [R_{BASE}]20$, the effective address is:

(A) $EA = (10 + R_{IDX}) + (20 + R_{BASE})$

(B) $EA = (10 + R_{IDX}) + (20 * R_{BASE})$

(C) $EA = (10 * R_{IDX}) + (20 + R_{BASE})$

(D) $EA = (10 * R_{IDX}) + (20 * R_{BASE})$