Question

The staff of/(a) that college not happy /(b) with their new working condition./(c) No error. (d)
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Answer 1

The staff at that college not with their new working conditions.

Answer 2

Answer:

b) that college not happy is the right option.

The correct sentence will be as follows the staff of that college is not happy with their new working condition.

So, upon spotting the error in the sentence, the erroneous part of the sentence is option b) that college not happy.

Here, rest of the options are eliminated and the right option is the b.