Which of the following instructions is used to transfer data in the 8085…

The correct answer is Option B (MOV). In the 8085 microprocessor instruction set, MOV stands for Move and is specifically designed to transfer data from one register to another or from a memory location to a register without altering the source. This makes it the primary instruction for data transfer operations within the CPU's internal registers or between memory and registers. In contrast, ADD (Option A) is an arithmetic instruction used for addition operations, which modifies the accumulator and status flags rather than simply moving data. Similarly, SUB (Option C) is an arithmetic instruction used for subtraction, affecting the accumulator and flags. Since MOV directly performs data transfer while ADD and SUB perform calculations, Option D is incorrect.