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Two stars of mass m(1) and m(2) are part...

Two stars of mass `m_(1)` and `m_(2)` are parts of a binary star system. The radii of their orbits are `r_(1)` and `r_(2)` respectivey, measured from the centre of mass of the system. The magnitude of gravitational force `m_(1)` exerts on `m_(2)` is

A

`(m_1m_2G)/(r_1+r_2)^2`

B

`(m_1G)/(r_1+r_2)^2`

C

`(m_2G)/(r_1+r_2)^2`

D

`(m_1+m_2)/(r_1+r_2)^2`

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