Velocity in the z direction is given by

• A. <img src="/_files/images/civil-engineering/upsc-civil-service-exam-questions/06-641-1.png">
• B. <img src="/_files/images/civil-engineering/upsc-civil-service-exam-questions/06-641-2.png">
• C. <img src="/_files/images/civil-engineering/upsc-civil-service-exam-questions/06-641-3.png">
• D. <img src="/_files/images/civil-engineering/upsc-civil-service-exam-questions/06-641-4.png">