Me and my friend got into an argument on which saying is right:
is it 'no, tu lo tienes'
or
is it 'no, tú lo tienes'
please give an answer and explain with detail

it's the second one

Explanation:

the second one has the accent on "tú" which would be right, however I have seen it before without the accent, but it normally has the answer and it's the right way to say it/ write it. Hope this was helpful!

The right answer is; "No, tú lo tienes":

Explanation:

Because in Spanish when you are referring to another person with whom you have confidence you speak of "tú", with the tilde in the letter U, and also works as a personal pronoun. therefore, this accentuation can only be used when you refer to a person, it is not used for animals or things. while when we write "Tu" without stress, it is used as a possessive adjective.