i tell him that i love him
"I tell him that I love him" is another correct answer for this sentence.
none is correct answer... as in first it is written i need
and in third option it is written that i tell HER that i love HIM( how u can use HIM and HER for same person)
Both him and her are correct at either place in this sentence. If you say "I tell her that I love him" then him and her are referring to different people. Eg I tell Jane that I love Peter.
I tell him that i love him