Fill in the blank with a suitable pronoun: My son and my daughter are very fond of _______.

Correct option is D

The phrase "my son and my daughter" refers to two people. When talking about affection or interaction between two people, we use the reciprocal pronoun each other.
Information Booster: · Reciprocal pronouns include each other and one another.
· Each other is used for two people or things, while one another is used for more than two.
· Example: The two friends helped each other during exams.
· Pronouns replace nouns to avoid repetition and improve sentence clarity.
· There are different types of pronouns: personal, possessive, reflexive, relative, demonstrative, and indefinite pronouns.
· Reflexive pronouns end in -self or -selves and refer back to the subject.
Additional Information: · Herself – A reflexive pronoun, used when referring to a single female subject.
· Himself – A reflexive pronoun, used when referring to a single male subject.
· Themselves – A reflexive pronoun, used when referring to multiple people performing an action on themselves.