Read the sentence to find out whether there is any grammatical or idiomatic error in it. The error, if any, will be in one part of the sentence. The corresponding letter of that part is the answer. If the given sentence is correct as it is, then choose option ‘No error’ as the answer response. (Ignore errors of punctuation, if any).

The removal of one kidney (A)/ is life-threatening since a (B)/ person can live a healthy life (C)/ with the remaining kidney(D)/ no error (E).

Correct option is C

The error lies in part (B) of the sentence.
The sentence contains a contradiction. The first part of the sentence states that the removal of one kidney is life-threatening, while the second part says that a person can live a healthy life with the remaining kidney.
Thus, “ not” should be added before “life-threatening” so that the sentence correctly conveys the idea that a person can survive with one kidney, and that the removal of one kidney is not necessarily life-threatening.
Hence, the correct sentence formed will be “The removal of one kidney is not life-threatening since a person can live a healthy life with the remaining kidney.”