Answer:
d)
La pera de la muchacha
The girl's pear
Explanation:
a)
Usually if the preposition 'de' is followed by the article 'el', they should always be contracted to form 'del', unless 'el' is part of a proper name.
El durazno de el niño = Incorrect
El durazno del niño = correct (The child's peach)
b)
El agua del niña = incorrect
El agua de la niña = correct (The girl's water)
c)
La cena del José = incorrect
c)
c)
La cena del José = incorrect
La cena de José = correct (Joseph's dinner)