In each of the questions given below, two phrases in a sentence are highlighted which may or may not be correctly used. From the given choices, choose the correct one(s) and mark the answer accordingly. Though roundabouts make for free-flowing traffic, the presence of  police personal is mandated  during rush hour, particularly when  swarms of vehicles intrude the roundabout; around the evening rush hour, white-and-khakhi flannels are unmissable at the Egmore roundabout
I. the police is required, group of vehicles
II. police personnel is warranted, swarms of vehicles invade
III. policemen are guaranteed, numerous vehicles interrupt

Solution By using the first highlighted phrase in this context, the author wants to refer to the idea that it is justified or necessary to have police officers present. The use ‘personal’ in the question sentence, makes it incorrect. Also, the use of singular verb ‘is’ after plural noun ‘the police’ in I is grammatically incorrect. Further, the use of ‘guaranteed’ in III will make the sentence unsound. Thus, I and III are incorrect. By using the second highlighted phrase in this context, the author suggests a large and overwhelming number of vehicles entering the roundabout during rush hour. The use of ‘intrude’ will give an inappropriate meaning to the sentence. Also, in III the use of ‘interrupt’ is incorrect. Only option II, where ‘police personnel is warranted’ and ‘swarms of vehicles invade’ are used, is correct. The word ‘warranted’ is used to indicate that there is a valid reason or justification for the presence of police personnel, especially during rush hour when there is a high volume of vehicles at the roundabout. Essentially, it suggests that having police officers there is deemed appropriate or needed to manage the traffic situation effectively. The use of ‘swarms’ conveys the image of a substantial and perhaps chaotic flow of vehicles, emphasizing the volume and intensity of traffic at that time. The word "invade" adds a sense of urgency or congestion, implying that the roundabout is being heavily used, possibly causing challenges for the flow of traffic Hence, the correct answer is option D.