Direction: Read the sentences to find out whether there is any grammatical error/mistake in it. Errors, if any, will be in TWO PHRASES of the sentence. The combination of those parts is the answer of that question. If no part in the sentence has an error then, mark 'No error' as your answer (ignore punctuation error if any).

Intelligence density planning is the (A)/ answer, with old and new (B)/ buildings cohabiting gracefully -- (C) / so arguing the architects. (D)