The following sentence has been split into four segments. Identify the segment that contains a grammatical error.
You must / be hurry, / otherwise you will / miss the train.

Correct option is B

The segment that contains a grammatical error is (b) "be hurry,". The correct phrase is "be in a hurry" instead of "be hurry."
 The phrase "be in a hurry" means to be moving or acting quickly because there is a time constraint.
 In this sentence, it is necessary to use the preposition "in" with "hurry" to make it grammatically correct.
 Therefore, the correct sentence would be: "You must be in a hurry, otherwise you will miss the train."