In each question below, a sentence is given with a part of it printed in bold type. 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. If the sentence is correct as it is and ‘No correction is required’ , mark ‘No correction required’ as the answer  . The playground was sadly dirty, and though the corners were scraps of paper and broken toys.