A reflexive pronoun that also acts as an emphasising agent in a sentence is known as:
 

The correct option is D) ‘Emphatic pronoun’. The words that are used in place of a noun are pronouns.  Reflexive pronouns are those which show that the actions done by the subject reflect back to them. Pronouns that stand to act as pointers are known as demonstrative pronouns. Pronouns that stand to show possession or ownership of someone over something are known as possessive pronouns. The reflexive pronouns used to emphasise are known as emphatic or emphasising pronouns. From these definitions of various types of pronouns, it is clear that the correct answer is (D).