Answer :

The instruction that stores 1 byte of unsigned data in RAM/ROM is a. MOV AL, 1. The correct option is a.

In assembly language, "MOV" stands for move, and it is used to transfer data between registers or memory locations. In this specific instruction, it moves the immediate value 1 into the AL register. The AL register is a 1-byte (8-bit) register, making it suitable for storing 1 byte of data. The value 1 is considered unsigned because it is a positive integer, and it can be stored in RAM or ROM, depending on the context of the program.

The other instructions (b. ADD BH, 1, c. PUSH CX, and d. XOR DL, DL) do not explicitly store 1 byte of unsigned data in RAM/ROM; they perform different operations like addition, pushing onto the stack, or bitwise XOR without directly storing an unsigned byte.

Thus, the instruction that stores 1 byte of unsigned data in RAM/ROM is a. MOV AL, 1.

Therefore the correct option is a.

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