Question

Los padres de Juan temen que él _____________ de noche.

a.
salir
b.
salga
c.
saldremos

Answer 1

The correct option should be B "los padres de juan temen que SALGA de noche". The verb is conjugated in the 3rd person singular.
As regards "salir", it is in the infinite form " salir a la noche es peligroso"
 and "saldremos" is plural and future tense. "Nosotros saldremos a la noche"

Answer 2

The correct option should be B