When the direction of current is from negative to positive terminal of the battery then emf (E) is taken as
The direction electric current in Physics taken in the external circuit: from positive to negative terminals of battery, it is the same with direction of electric field. However electrons move from negative to positive terminals. In the question written: emf (E) is taken as. If here means Electromotive Force (EMF), it is scalar quantity, no direction. In this case we may choose answer d-normal.
However, if in the question talking about current direction inside the battery, it is from negative to positive terminals. So, it is also normal.
Note: please provide more details of question if explanation is not enough.
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