Topic: Pronoun (সর্বনাম),

Best Answer Explained in Below-:

The phrase "as great as that of any other person" provides a clear and grammatically correct comparison of courage. This construction uses "that of" to refer explicitly to the courage possessed by others, ensuring clarity in the comparison. It signifies that the person being complimented possesses courage equal in magnitude to that of any other individual who defends their country, making it a precise and elegant choice.

In contrast, option A, "as great as any other person," lacks specificity and can be misinterpreted as directly comparing the person to their peers without emphasizing the quality of courage specifically. Option B, "as great as any other persons," is grammatically incorrect since it implies comparing against multiple individuals rather than focusing on the singularity of courage. Option C, "great like other person," is not only informal but also fails to convey the same level of comparison implied in the original statement.

Thus, option D is the most suitable choice, maintaining both clarity and grammatical integrity while effectively emphasizing the subject's courage.