Change the narration: Aslam said to him, "Why don’t you go today?"

Aslam asked him not go that day.

Aslam asked him why he did not go today.

Aslam asked him why he did not go that day.

None of these

Direct speech: "Why don’t you go today?"

Changes in indirect speech:

"don’t you go" → "he did not go" (present to past)

"today" → "that day"

Question becomes a statement structure: no question mark.

So, the correct indirect form is:

"Aslam asked him why he did not go that day."