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An electric dipole has a fixed dipole moment $\overrightarrow{p}$, which makes angle $\theta$ with respect to x-axis. When subjected to an electric field $\overrightarrow{E_1} = E \hat{i}$, it experiences a torque $\overrightarrow{T_1} = \tau \hat{k}$. When subjected to another electric field $\overrightarrow{E_2} = \sqrt{3} E_1 \hat{j}$ it experiences a torque $\overrightarrow{T_2} = - \overrightarrow{T_1}$. The angle $\theta$ is :

( A ) $90^{\circ}$
( B ) $60^{\circ}$
( C ) $30^{\circ}$
( D ) $45^{\circ}$

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