In the question below, three sentences are given with one phrase emboldened in each. From the given options, choose the one with the phrase that can replace the emboldened part in each of the three sentences without making the sentence grammatically and contextually incorrect and mark that as your answer. If all the emboldened phrases are correct, mark 'No correction required' as your answer
I. I could not pass as I did not study properly and slept under the exam , and now I regret it.
II. My sister has been preparing for impress them throughout the year and I'm sure she will do well.
III. The Dean has decided that he will himself preside as an invigilator for the exam in to ensure strict implementation of rules and regulations.

In sentence I, the usage of the preposition 'under' is contextually incorrect [a person can't sleep under an exam]; 'under' can be changed to 'during'. Under: Extending or directly below; during: throughout the course or duration of (a period of time). In sentence II, the verb after the preposition 'for' must be in -ing form and so 'impress' must be changed to 'impressing'. In sentence III, the phrase ends with the preposition 'in', which is followed by another preposition 'to'. This is grammatically incorrect; so the preposition 'in' should be omitted. The phrases in options a), c), and d) talk about 'booking a slot', 'telling (a person) to be quiet', 'working hard', which find no relevance/connection in context to any of the statements and thus can be eliminated. Among the given options, option (b) is the only one that fits grammatically and contextually in all the sentences. Hence, the correct answer is option (b).