(Q.16-20): In each question below, a sentence is given with a part of it printed in bold type. That part may contain a grammatical error. Each sentence is followed by phrases 1), 2), 3) and 4). Find out which phrase should replace the phrase given in bold to correct the error, if there is any, and to make the sentence grammatically meaningful and correct.
The leeward side of Sirumalai hills arean unique ecosystems that receiving optimum rain and shine.
Ais a unique ecosystem that receivingCorrect AnswerIncorrect Answer
Bare an unique ecosystem that receivesCorrect AnswerIncorrect Answer
Care a unique ecosystem when receivingCorrect AnswerIncorrect Answer
Dis a unique ecosystem that receivesCorrect AnswerIncorrect Answer
ENo correction requiredCorrect AnswerIncorrect Answer
The leeward side of Sirumalai hills is a unique ecosystem that receives optimum rain and shine.