Explanation:

The 8085 microprocessor is an 8-bit microprocessor designed by Intel. It has a total of 246 instructions, which are categorized into various groups based on their functionality. The instructions in the 8085 microprocessor are executed sequentially, one after the other.

The accumulator is a register in the 8085 microprocessor that is used to store data during arithmetic and logical operations. It is an 8-bit register and is the primary register used for arithmetic and logical operations.

The instruction CMP C compares the contents of the accumulator with the contents of the register C. It does not alter the contents of the accumulator. Similarly, the instruction ORA A performs a logical OR operation between the accumulator and itself, which also does not alter the contents of the accumulator.

The instruction ANI 5 performs a logical AND operation between the accumulator and the immediate data 5. This will change the contents of the accumulator, but the new contents will be the result of the logical AND operation between the previous contents of the accumulator and 5.

The instruction CPI 3A compares the contents of the accumulator with the immediate data 3A. It does not alter the contents of the accumulator. However, if the contents of the accumulator are equal to the immediate data 3A, the zero flag (Z) will be set.

Therefore, the correct answer is option B, CPI 3A, as it compares the contents of the accumulator with the immediate data 3A and may set the zero flag (Z), which alters the state of the accumulator indirectly.