"En el verano nuestra casa es muy incómoda porque no tiene aire acondicionado. ¿Y la suya?" "_____ sí lo tiene."

a. La tuya
b. El suyo
c. La nuestra
d. El nuestro

i don't know about this one

i think maybe C or D?

"In the summer our home is very uncomfortable because it has no air conditiioning. And YOURS?" This could be singular or plural and since "La mía" is not a choice, it has to be c. "ours" = la nuestra. At least, even if you don't understand the question , "la suya" tells you the noun will be feminine singular, so immediately you have eliminated b and d.

Sra