A heavy elastic ball drops from the ceiling of a room, and after rebounding once from the floor, reaches a height equal to three-fourth of that of the ceiling. The coefficient of restitution will be

• A. <img src="/_files/images/civil-engineering/upsc-civil-service-exam-questions/08-35-1.png">
• B. <img src="/_files/images/civil-engineering/upsc-civil-service-exam-questions/08-35-2.png">
• C. <img src="/_files/images/civil-engineering/upsc-civil-service-exam-questions/08-35-3.png">
• D. <img src="/_files/images/civil-engineering/upsc-civil-service-exam-questions/08-35-4.png">