Question

______her parents are engineers. ( All, None,Both)​

Answer 1

Answer:

both her parents are engineers.

Answer 2

Answer:

Both

Explanation:

There are only 2 parents for a child, so both.

'All' can't be used, as the number of parents is restricted to 2.

And None can't be used because to use None, there should be a preposition 'of' inbetween.

Like : None of her parents are engineers.

But there is no of in the question.