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An electric dipole has fixed dipole mome...

An electric dipole has fixed dipole moment `vec(p)`, which makes angle `theta` with respect to x- axis. When subjected to an electric field `vec(E_(1)) = Ehat(i)`,it experiences a torque `vec(T_(1)) = tau hat(k)`. When subjected to another electric field `vec(E_(2)) = sqrt(3)E_(1)hat(j)` it experiences a torque `vec(T_(2)) = - vec(T_(1))`. The angle `theta` is

A

`30^(@)`

B

`45^(@)`

C

`60^(@)`

D

`90^(@)`

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