Directions: The given sentence has been broken up into four different parts. The error, if any, will be in any one part of the sentence. Select the option which contains the part of the sentence which has an error (spelling, grammatical or contextual). If there is no error, choose option E.
» Explain it
C
The sentence has an error in its C part. 'Institute' is wrongly used here.

We have to replace 'institute' with 'institutes'. ‘Many’ is used with plural nouns and verbs. Therefore 'many' requires a plural noun here - many students, many persons, many copies, many results etc.
 
The correct sentence would be:

"Due to the poor design of the online education system, there are not many institutes in India that offer this kind of facility."

Hence, option C is correct.
 
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D
There is an error in the part D of the sentence. The use of “broke off” as a phrasal verb is wrong here. “Break off” means to become separated, hence it doesn’t fit in the context of the sentence. It should be replaced by “broke out”. If something such as war, fighting, or disease breaks out, it begins suddenly.
 
The correct sentence would be:

A major tragedy was averted when firefighters rescued several people from a five-storey building in Kolkata after a massive fire broke out on Thursday morning.
 
Example: I was in a nightclub in Pennsylvania and a fight broke out.

Hence, option D is correct.
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C
Part C has an error. We need to replace 'be' with 'have been' to make the sentence grammatically correct as 'have been' is used to show something that started in the past and has continued up until now.

Hence, option C is correct.
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D
The fragment D of the sentence has a prepositional error. The preposition 'in' is wrongly used here. It would be replaced by preposition 'by' in the sentence.

Hence, option D is correct.
» Explain it
D
Part D has an error. The article 'the' is redundant here. We need to remove 'the' before modern medicines, as we are not talking about any specific modern medicine here.

Hence, option D is correct.