Objects A and B each of mass m are connected by light inextensible cord. They are constrained to move on a frictionless ring in a vertical plane. The object is released from rest at the positions as shown. The tension T in the cord just after release will be

Question

$$(a)\;mg \sqrt 2\quad (b)\;\frac{mg}{\sqrt 2} \quad (c)\;\frac{mg}{2} \quad (d)\;\frac{mg}{4}$$