Rohini satellite is at a height of 500 km. and Insat-B is at a height of 3600 km. from surface of earth then relation between their orbital velocity ($V_R$,$V_1$) is :

Question

( A ) $V_R = V_1$
( B ) ${V_R} < {V_1}$
( C ) ${V_R} > { V_1}$
( D ) No relation