Each item in this section has a sentence with three parts labelled as (a), (b) ad (c). Read each sentence to find out whether there is any error in any part and indicate your response on the Answer Sheet against the corresponding letter i.e., (a) or (b) or (c). If you find no error, your response should be indicated as (d). A species is considered /(a) endangered when it is /(b) in a very high risk of extinction in the world. /(c) No error. (d) Correct Answer (c) The correct answer is (c). Key Points​ ​There are some fixed prepositional phrases given below: ​by the dint of, at risk, out of jealousy, on strike, by the dozen, owing to, on a trip, for a change, etc. For example: All houses within 100 metres of the seas are at risk of flooding. ​The phrase 'at risk' means a situation involving exposure to danger. Thus the preposition 'at' will be used instead of 'in' in the 3rd part of the question. Correct Sentence: A species is considered endangered when it is at a very high risk of extinction in the world. Additional Information There are some verbs/nouns/adjectives which are followed by fixed preposition given below: ​Exonerate from, refrain from, suspicious of, interested in, inured to, accused of, a predilection for, a respite from, vexed at, etc. Example: ​After spending some time on the island they became inured to the hardships.