Question : Find out the erroneous part.
Since yesterday, I am reading a book which has been written by a famous writer.
Option 1: No error
Option 2: am reading a book
Option 3: which has been written by
Option 4: a famous writer
Option 5: Since yesterday, I
Correct Answer: am reading a book
Solution : The sentence needs have been as the starting point of the activity is given and the action is still continuing.