All of them except for the 3rd sentence are correct :)
The answer is A thank me later
What ads r u talking about
Answer: A reflexive pronoun reflects back on the subject of the sentence. But, a intensive pronoun adds emphasis or intensity to a noun.
Examples: A intensive/reflexive pronouns include myself, yourself, himself, herself, itself, ourselves, yourselves, themselves. And, used in a sentence would be..
"I was in a hurry, so I washed the car myself."
"You're going to have to drive yourself to school today."
"He wanted to impress her, so he baked a cake himself."
Hope this helped you out!
