Question :
In the question below, a sentence is given with four words highlighted in bold. One of these four words may be either wrongly spelt or inappropriate in the context of the sentence. Find out the word, which is wrongly spelt or inappropriate, if any. If all the words are correctly spelt and appropriate in the context of the sentence, mark 'All are correct' as your answer.
New studies (A) from the fields of psychology (B), metabolism and sleep offer practical (C) clues to the overreating (D) puzzle.