JEE Main Physics question

A body of mass 2 kg attached to a string is whirled in a vertical circle of radius 5 m. The minimum speed of the body at the lowest point so that the string does not slacken at the highest point is

• (A)15.65 m/sCorrect
• (B)6.75 m/s
• (C)20.87 m/s
• (D)45.83 m/s