Question

Your new boss just entered your office, he says "Bonjour Monsieur, comment allez-vous?". How would you answer his question? By saying “Ça va. Et toi?” By shake his Hand and saying ”Salut. Et vous?” By saying “Bonjour. Et toi?” and shaking his hand. By shaking his hand and saying ”Bonjour. Bien et vous?”

Answer 1

By shaking his hand and saying "Bonjour. Bien et vous?" The question asks/says Hello Mister/sir (formal), how are you? You answer by saying "Hello. Good and you?"

Answer 2

Bonjour

your boss = Bonjour Monsieur, comment allez-vous ?

you = Bonjour. Bien et vous ?

ça va et toi? = toi is unformal you

Salut. Et vous ? = salut isn't approppriate with your boss

Bonjour. Et toi ? = et toi is informal you

Bonjour. Bien et vous ? vous de politesse

hope this helps ☺☺☺