In the following question, sentence given with blank to be filled in with an appropriate word(s). Four alternative are suggested for the question. Choose the correct alternative out of the four and indicate it by selecting the appropriate option.
The order is _________ and you must abide by it, as there is not even the slightest chance of its being modified or withdrawn.

Options

A. irretrievable
B. irreparable
C. irrevocable
D. irreconciliable

Answer

C