Question

he worked hard_ he could not get arank​

Answer 1

Answer:

He worked hard than he could not get a rank.

Hope it helps you

Answer 2

Answer:

He worked hard but he could not get a rank.

Explanation:

But is a joining word or a conjunction used to join two sentences or phrases. But implies or refers to any contradiction or opposition. When one thing is expected to happen and something contrary happens then we use a ‘but’. For example, we saw him but he ignored us.

In this sentence, the person he had worked hard and was expected to get a rank however he failed to achieve the rank. Therefore but has been used in this case.