If a particle covers half the circle of radius 𝑅 with constant speed then

Question : If a particle covers half the circle of radius 𝑅 with constant speed then

(A) Change in momentum is 𝑚𝑣r

(B) Change in 𝐾. 𝐸. is 1/2 $mv^{2}$

(C) Change in 𝐾. 𝐸. is $mv^{2}$

(D) Change in 𝐾. 𝐸. is zero