Explanation:

The given assembly program is executed on the 8085 microprocessor. Let's go through the program step by step to understand its functionality.

1. MVI A, DATA1: This instruction moves the immediate data value DATA1 to the accumulator (register A).
2. MOV B, A: This instruction copies the value of the accumulator to register B.
3. SUI 51 H: This instruction subtracts the immediate value 51H from the accumulator. Since the accumulator initially contains DATA1, this instruction essentially subtracts 51H from DATA1.
4. JC DLT: This instruction jumps to the label DLT if the carry flag (JC stands for jump if carry) is set. The carry flag is set if the previous operation resulted in a borrow or underflow. In this case, if the subtraction in the previous instruction resulted in a borrow, the program will jump to the DLT label.
5. MOV A, B: This instruction copies the value of register B to the accumulator. If the previous subtraction did not result in a borrow, the original value of DATA1 is copied back to the accumulator.
6. SUI 82 H: This instruction subtracts the immediate value 82H from the accumulator. If the previous subtraction resulted in a borrow, this instruction will subtract 82H from DATA1. Otherwise, it will subtract 82H from the original value of DATA1.
7. JC DSPLY: This instruction jumps to the label DSPLY if the carry flag is set. If the previous subtraction resulted in a borrow, the program will jump to the DSPLY label.
8. DLT: This is a label where the program will jump if the carry flag is set after the first subtraction. It does not perform any operation.
9. XRA A: This instruction performs an XOR operation between the accumulator and itself, effectively setting the accumulator to zero.
10. OUT PORT1: This instruction outputs the value of the accumulator to the port specified by PORT1. Since the accumulator is zero at this point, it will output 00H to PORT1.
11. HLT: This instruction halts the program execution.

Conclusion:
Since the program outputs 00H to PORT1 and performs no other output operation, option 'C' (all bytes at PORT1) is incorrect. Similarly, the program outputs the bytes from 52H to 81H at PORT2 if the carry flag is set after the first subtraction, so option 'A' (bytes from 51H to 82H at PORT2) is incorrect. The correct option is 'D' (bytes from 52H to 81H at PORT2) as it reflects the behavior of the program when the carry flag is not set after the first subtraction.