# In a loop-the-loop, a body starts at a height ℎ = 2𝑅. The minimum speed with which the body must be pushed down initially in order that it may be able to complete the vertical circle is

Question : In a loop-the-loop, a body starts at a height ℎ = 2𝑅. The minimum speed with which the body must be pushed down initially in order that it may be able to complete the vertical circle is

(A) $\sqrt{2gR}$

(B) $\sqrt{gR}$

(C) $\sqrt{3gR}$

(D) $2\sqrt{gR}$