Read the sentence to find out whether there is any error in it or not. The error, if any, will be in one part of the sentence. The number of that part (which has the error) is the answer. If there is no error, the answer is (4). Ignore errors of punctuation, if any. In the age of  79, the great American writer (1)/ Philip Roth announced that he (2)/ would stop writing. (3)/ No error (4)?

Option 1 : In the age of  79, the great American writer

The error is in part 1 as the preposition ‘In’ before ‘the age of’ is incorrect. The statement should be ‘At the age of’ instead of “in the age of”.

‘At’ is used to show a particular location and specific time or age. Therefore, the correct sentence is: At the age of 79, the great American writer Philip Roth announced that he would stop writing.

To remember the usage of ‘at’ and ‘in’, few examples are given below:
1. She always did well at college.
2. How many people work at KPMG?
3. She is sleeping in her room.
4. He could not focus in  class.