Question

(A) MOV A, C is a one-byte instruction.
(B) OUT 03 H is a two-byte instruction.
(C) ANI 76 H is a three-byte instruction.
(D) STA 3000 H is a three-byte instruction.

• A. (A), (B), and (D) only
• B. (A), (B), and (C) only
• C. (A), (B), (C), and (D)
• D. (B), (C), and (D) only

Hint:

When learning instruction sizes, remember that:
- One-byte instructions generally involve register-to-register operations.
- Two-byte instructions involve memory locations or I/O operations.
- Three-byte instructions often involve addresses or immediate data.

Answer 1

The Correct Option is C

Step 1: Determine the size of each instruction.
- MOV A, C is a one-byte instruction, typically in most microprocessors.
- OUT 03 H is a two-byte instruction (it requires a memory location and the instruction code).
- ANI 76 H is a three-byte instruction (it requires a constant operand).
- STA 3000 H is a three-byte instruction (it requires the address of a memory location).

Final Answer: \[ \boxed{3. \text{(A), (B), (C), and (D)}} \]