The following sentence has been divided into four segments. Identify the segment that contains a grammatical error.
My Vice-Chancellor works / eighteen hours / a day, / seven days week.

Correct option is B

Explanation:
The phrase “seven days week” is incorrect because it lacks the article “a.” The correct phrase is “seven days a week.”
Correct Sentence:
My Vice-Chancellor works eighteen hours a day, seven days a week.
Grammar Rule:
· When expressing frequency, we use the pattern:
· Number + units + a + time expression
· Example: He goes to the gym five times a week.