JEE Main Physics question

A ball is moving to and fro about the lowest point of a smooth hemispherical bowl. If it is able to rise up to a height of 20 cm on either side of , its speed at must be (take m/s², mass of the body 5 g)

• (A)0.2 m/s
• (B)2 m/sCorrect
• (C)4 m/s
• (D)4.5 m/s