Which possessive adjective correctly completes this conversation?

Marco: ¿Esa es la foto de la boda de tus padres?
Marta: Sí, ellos son ______ padres.

mis
tu
su
mi

Respuesta :

It would be "mis"

"mis" and "mi" both mean my in English the difference is "mis" is plural and since her parents are plural it would be "mis" instead of "mi" 


Translation

Marco: is that your parents wedding photo?
Marta: Yes, they are my parents.


Martha: Sí, ellos son mis padres
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