The moment of inertia of a circular section about any diameter D, is

• A. <img src="/_files/images/civil-engineering/theory-of-structures/86-21-57-1.png">
• B. <img src="/_files/images/civil-engineering/theory-of-structures/86-21-57-2.png">
• C. <img src="/_files/images/civil-engineering/theory-of-structures/86-21-57-3.png">
• D. <img src="/_files/images/civil-engineering/theory-of-structures/86-21-57-4.png">