Which form would be the correct for reflexive verb lavarse subject nosotros?

The correct form for the reflexive verb *lavarse* with the subject *nosotros* is nos lavamos.

Here's why:

* lavarse: This is the reflexive verb meaning "to wash oneself."

* nosotros: This is the subject pronoun for "we."

* nos: This is the reflexive pronoun for "ourselves" in the plural.

* lavamos: This is the first-person plural present tense conjugation of the verb "lavar" (to wash).

So, the complete sentence would be: Nosotros nos lavamos. (We wash ourselves.)