1. Forces on a dipole in an electric field

An electric dipole consists of charges $+q$ and $-q$ separated by a small distance.

• In a uniform electric field, the forces on the two charges are equal and opposite, so the net force is zero.
• However, if the dipole is inclined to the field, these forces form a couple and produce a torque.

So in a uniform field:

• net force $=0$
• torque $=pE\sin\theta$

2. Effect of a non-uniform electric field

In a non-uniform electric field, the magnitudes/directions of the electric field at the two charges are not exactly the same.

Hence the forces on $+q$ and $-q$ do not cancel completely.

Therefore, the dipole experiences:

• a net translational force, and
• since it is at an angle $30^\circ$ to the field, also a torque.

3. Torque on the dipole

The torque is

Here $\theta = 30^\circ$, so

Thus torque definitely acts.

4. Check the options

• A: a translation force only in the direction of the field
  Incorrect, because torque also acts.

• B: a translation force only in a direction normal to the direction of the field
  Incorrect, because torque also acts, and the force direction is not restricted like this in general.

• C: a torque as well as a translational force
  Correct, because in a non-uniform field the dipole gets net force, and at $30^\circ$ it also gets torque.

• D: a torque only
  Incorrect, because a non-uniform field also produces a net translational force.

5. Final answer

Therefore, the dipole will experience both torque and translational force.