In the following twenty questions, some parts of the sentences have errors and some are correct. Find out which part of a sentence has an error and blacken the circle corresponding to the appropriate correct option. If sentence is free from errors. Blacken the circle corresponding to "No error"in the Answer Sheet.
Thanks to an insight and persistence of the local doctor, hundreds of victims have been able to resume normal life.

Options

A. No error
B. and persistence of the local doctor,
C. hundreds of victims have been able to resume normal life.
D. Thanks to an insight

Answer

D

Explanation

insight (N.) is not a Countable/Uncountable Noun.
It is an Abstract Noun. So, the (Def. Art.) will be used before it. Hence, thanks to the insight is the right usage.