Two stars of masses M and m (M = 2 m) separated by a distance d = 3 astronomical unit, revolve in circular orbit about their centre of mass with a period of 2 years. If $$M_s$$ is mass of Sun then

A

$$m = 2.25\,M_s$$

B

$$m = 1.25\,M_s$$

C

$$m = 2.50\,M_s$$

D

$$m = 4.50\,M_s$$