Q. For given figure $m_A$ is 30 kg $m_B=m_C$ = 5 kg respectively. All contact surfaces are smooth. 
(g = 10m/$s^2$). Select the correct statements. 

(A) Acceleration of block A, B and C are 1 m/$s^2$, 3 m/$s^2$and 5 m/$s^2$ respectively 
(B) Contact force between B & Ground is 350 N 
(C) Tension in string 30N 
(D) Contact force between 'B' and 'C' is 15 N