Instruction Execution

Step 1: Understand the Expression.
We are given the expression , and we are using two-address instructions. This involves loading operands into registers, performing operations on them, and storing the result in a final variable.

Step 2: Instruction Breakdown.
- (A) MOV R1, A: Load the value of into register .
- (C) MOV R2, C: Load the value of into register .
- (B) MUL R1, R2: Multiply the values in and , and store the result in . This gives .
- (D) ADD R2, D: Add the value of to register which currently holds the value of , so it becomes .
- (E) MOV X, R1: Store the result from (which contains ) into the variable .

Step 3: Execution Order.
The correct sequence of instructions to compute the expression using two-address instructions is:
1. First, load into (A). 2. Then, load into (C). 3. Perform the multiplication (B). 4. Add to (D). 5. Store the result of multiplication into (E).

Step 4: Conclusion.
The correct sequence is (2) A, C, B, D. Therefore, the correct answer is option (2).