The exhibition committee P : attractive and useful Q : to make the exhibition R : making efforts S : has been The Proper sequence should be:

The correct answer is: C. SRPQ

The exhibition committee has been making efforts to make the exhibition attractive and useful.

• S: The exhibition committee has been making efforts.
• R: The efforts are to make the exhibition attractive and useful.
• P: The exhibition is the object of the efforts.
• Q: The efforts are being made.

The other options are incorrect because they do not follow the correct order of the words.