A part of the sentence may or may not have an error. Find out which part has an error and mark that part as your answer. If there are no errors, mark 'No error' as your answer.   The NITI Aayog’s recently launched state Education Quality Index (SEQI),which  (A)/was developed to evaluate the performance of states and union territories (B)/ in the education sector, has the potential to be a game-changer for improvement on education in India.(C)/ No Error(D) ?

Option 3 : C

The correct answer is option 3) i.e. C

• The given sentence is erroneous for the wrong usage of preposition with ‘improvement’
• When there is one subject or entity and it improves, in that case, the preposition ‘to’ is used with ‘improvement’; whereas, when there is two different subjects or entities and the latter one shows improvement, in that case, the preposition ‘on’ is used with it.
• Therefore, replace preposition ‘on’ with ‘in’
   

The correct answer- 'The NITI Aayog’s recently launched state Education Quality Index (SEQI), which was developed to evaluate the performance of states and union territories in the education sector, has the potential to be a game-changer for improvement in education in India.'