Normalmente, no hay en una zona residencial. a. casas privadas c. condominios b. departamentos d. fábricas

A residential area (zona residencial) is where most of the dwellings (houses and/or buildings) are grouped so that people live there, unlike a commercial or industrial area.

Generally, in those areas, depending on the social status there are condominiums (condominios), private houses (casas privadas) or apartments (departamentos).

Factory-type constructions are not allowed, as they are intended for industrial zones.

Therefore, the correct answer is:

(Factories)

Normally, there are no factories in a residential area