Voy a elegir la que me más gusta
a cama
b programa
c tema
d mapa

A) cama

Voy a elegir la cama que más me guste.

Translation: I'm going to choose the bed that I like the most.

Explanation:

The definite article in this sentence is "la", which is a feminine, singular article, so the noun must agree on gender and number, but the only singular, feminine option is "cama", so it is the correct one. La cama.  In addition, in affirmative sentences with simple verbs, the indirect object pronoun, comes directly before the verb. Me guste.