An isolated load W is acting at a distance a from the left hand support, of a three hinged arch of span 2l and rise h hinged at the crown, the horizontal reaction at the support, is

• A. <img src="/_files/images/civil-engineering/theory-of-structures/95-21-162-1.png">
• B. <img src="/_files/images/civil-engineering/theory-of-structures/95-21-162-2.png">
• C. <img src="/_files/images/civil-engineering/theory-of-structures/95-21-162-3.png">
• D. <img src="/_files/images/civil-engineering/theory-of-structures/95-21-162-4.png">