In the sentence given below, a word is printed in bold. Below it, four choices are given. Pick the one which is most nearly the same in meaning as the word printed in bold and can replace it without altering the meaning of the sentence.
When the police questioned him, he gave very incoherent answer at first.
irrational
inconsistent
irrelevant
irritating
Correct answer is B
No explanation has been provided for this answer.