Question

—¿Adónde vas para comer? —_____ al restaurante. Van Voy Va Vas

Answer 1

Its voy... “Voy al restaurante”

Answer 2

I believe it's Voy, because that is the "I" or "Yo" form of the word "ir", meaning "to go".

Where are you going to eat?

(I am going to) The restaurant.

¿Adónde vas para comer?

Voy al restaurante.