Step-by-step explanation:
The correct conjugation of the reflexive verb "se laver" in the present tense for the subject "Paul" is Option 1: lave.
The correct conjugation is:
Paul se lave les mains.
In this conjugation, the reflexive pronoun "se" is followed by the verb "laver" with the appropriate ending to match the subject. Since "Paul" is the singular form, the correct form is "lave."