CORRECT ANSWER:
B) Este libro rojo es tuyo, y esta camisa azul es mía.
In Spanish, the ending of the adjectives follows the attributes of the noun it refers to. And the possessive pronouns follow the attributes of the thing that is being “possessed”; not that of the owner.
Therefore the possessive pronoun “mía” (mine) finishes with letter “a”. Not becase the owner is feminine, but because the thing that is owned (la camisa), is feminine and singular.
The same happens with “tuyo” (yours). It finishes with letter “o” because it refers to “este libro” (masculine/singular). And not because the owner is masculine/singular.
In Spanish, the ending of the adjectives describe whether the noun they refer to is masculine/feminine and singular/plural. However, colors that don’t finish with letter “o” (like “azul“) don’t turn masculine/feminine. That is why we can say “rojo” and “roja“, but we cannot say “azulo” and “azula“. Just “azul“.
However, it is permitted to say “azulado” and “azulada“, which literally means “blueish”.
Video-lessons to learn more about Spanish possessive pronouns:
– https://youtu.be/3gs1mPylij4
– https://youtu.be/plqEg8W_iU8
– https://youtu.be/k44wgyCmnxs
– https://youtu.be/HSDMm0IFY8Q