Question

Who was standing just inside the entrance ?
(प्रवेश द्वार के करीब कौन खड़ा था ?)​

Answer 1

Answer:

In the entrance" suggests actually within the doorway or entrance passage, or perhaps just inside the door or opening. The speaker might even be partly blocking the entrance. "at the entrance" more generally suggests "somewhere near the entrance", perhaps just outside it.

In many cases there will not be much practical difference of meaning.