A simply supported beam with an overhang is traversed by a unit concentrated moment from the left to the right as shown below The influence line for reaction at B is given by

• A. <img src="/_files/images/civil-engineering/gate-exam-questions/912-279-2.png">
• B. <img src="/_files/images/civil-engineering/gate-exam-questions/912-279-3.png">
• C. <img src="/_files/images/civil-engineering/gate-exam-questions/912-279-4.png">
• D. zero everywhere.