The maximum B.M. due to an isolated load in a three hinged parabolic arch, (span l, rise h) having one of its hinges at the crown, occurs on either side of the crown at a distance

• A. <img src="/_files/images/civil-engineering/theory-of-structures/95-21-167-1.png">
• B. <img src="/_files/images/civil-engineering/theory-of-structures/95-21-167-2.png">
• C. <img src="/_files/images/civil-engineering/theory-of-structures/95-21-167-3.png">
• D. <img src="/_files/images/civil-engineering/theory-of-structures/95-21-167-4.png">