In the following questions, four alternatives are given for the Idiom/Phrase printed in bold in the sentence. Choose the alternative which best expresses the meaning of the Idiom/Phrase.
The representatives of the two states tried to enforce a treaty which was a dead letter.

Options

A. not well thought out
B. not longer in force
C. no longer relevant
D. not in keeping with the changing times

Answer

B

Explanation

A dead letter a law or an agreement that still exists but that is ignored.