Select the correct direct form of the given sentence. I warned her th…

The correct answer is Option (3) → I said to her, “I can no longer tolerate your coming late.”

Changing a warning from indirect back into direct speech:

Here the change goes the other way. We start from the indirect sentence and get back the speaker's own words. To tolerate means to put up with something.

Change	Indirect	Direct	Why
Reporting verb	warned her	said to her	"Warned" goes back to the plain "said to". The warning now shows in the spoken words inside the quotation marks.
Joining word	that	" " (quotation marks)	"That" is dropped. The spoken words go inside quotation marks.
Tense change	could	can	Going back, the past "could" returns to the present "can" (can + base form (V1)).
Pronoun change	her coming	your coming	In the quote she is spoken to directly. So "her" becomes "your". "I" stays "I", as I am the speaker.
Full sentence	I warned her that I could no longer tolerate her coming late.	I said to her, "I can no longer tolerate your coming late."

Other words go back too: would → will, that → this, there → here. Example: Sita told me that she would call me that evening. → Sita said to me, "I will call you this evening."

Why the Other Options are Incorrect?

Option 1: I said to her, “He can no longer tolerate her coming late.” — Incorrect. I am the one who cannot tolerate it. "He" puts the feeling on someone else.

Option 2: I said to her, “You can no longer tolerate my coming late.” — Incorrect. "You ... my" turns the meaning around. Now she is upset about my coming late.

Option 4: I said to her, “I can no longer tolerate she coming late.” — Incorrect. She is the person spoken to. So her coming late is "your coming", not "she coming".