The ratio of the length and diameter of a simply supported uniform circular beam which experiences maximum bending stress equal to tensile stress due to same load at its mid span, is

• A. <img src="/_files/images/civil-engineering/theory-of-structures/88-21-87-1.png">
• B. <img src="/_files/images/civil-engineering/theory-of-structures/89-21-94-2.png">
• C. <img src="/_files/images/civil-engineering/theory-of-structures/89-21-94-3.png">
• D. <img src="/_files/images/civil-engineering/theory-of-structures/89-21-94-4.png">
• E. 1.0