Question

"What a strange coincidence!" Dr singh said to the chairman,"Can you identify the space craft?" ( into indirect speech )

Answer 1

Dr Singh exclaimed with wonder to the chairman that what a strange coincident. Singh also asked to the chairman if he could identify the space craft.

i think this is OK

Answer 2

Explanation:

Dr. Singh exclaimed to the chairman that it was a  strange coincident. Singh also asked to the chairman if he could identify the space craft.

Basically the conversion of direct speech into indirect speech involves that a person is conveying the entire event to a third person.  While converting direct speech into indirect, there is no use of inverted comma and the sentence doesn’t have the exact words as they are in the direct speech.