How are the velocity coefficient Cv, the discharge coefficient Cd and the contraction coefficient Cc of an orifice related

How are the velocity coefficient Cv, the discharge coefficient Cd and

1.	How are the velocity coefficient Cv, the discharge coefficient Cd and the contraction coefficient Cc of an orifice related
A.	\({C_v} = {C_c}{C_d}\)
B.	\({C_c} = {C_v}{C_d}\)
C.	\({C_d} = {C_c}{C_v}\)
D.	\({C_v} = {C_c}{C_d} = 1\)
Answer» D. \({C_v} = {C_c}{C_d} = 1\)