The correct answer would be: Cuando _X_ lavo el coche, no uso detergente.
Good luck!
Answer:
what is the meaning of this question
Hey!
While both are often used, the most accurate answer is probably answer a:
The "personal a" is necessary.
Why?
Well, when we say: "Quiero a mi esposo Jorge" we are talking specifically about the husband, that is: "lo quiero a él". Therefore, the "a" is usually used on these occasions.
