Which sentence uses an intensive pronoun?
B) I myself like a little stroll after a delicious dinner.
An intensive pronoun is practically identical to a reflexive pronoun. It is defined as a pronoun that ends in self or selves and places emphasis on its antecedent by referring back to another noun or pronoun used earlier in the sentence.
In this case, the intensive pronoun myself refers back to the pronoun I used earlier in the given sentence.