If \( \theta \) is the angle between the velocity and acceleration of a projectile at a point of...

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If \( \theta \) is the angle between the velocity and acceleration of a projectile at a point of its path, its value when the projectile is at the highost point is :
(A) \( 0^{\circ} \)
(B) \( 180^{\circ} \)
(C) \( 90^{\circ} \)
(D) \( 45^{\circ} \)
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