If an ascending gradient of 1 in 50 meets another ascending gradient of 1 in 30 then the deviation angle is :

• A. <img src="/_files/images/civil-engineering/gate-exam-questions/900-161-1.png">
• B. <img src="/_files/images/civil-engineering/gate-exam-questions/900-161-2.png">
• C. <img src="/_files/images/civil-engineering/gate-exam-questions/900-161-3.png">
• D. <img src="/_files/images/civil-engineering/gate-exam-questions/900-161-4.png">