Correct statements for the given reaction are: A. Compound ‘ B ’ is aromatic B. The completion of above reaction is very slow C. ‘ A ’ shows tautomerism D. The bond lengths of C - C in compound B are found to be same Choose the correct answer from the options given below.

Step-by-step solution

Aromatic compounds are cyclic, planar and must obey Huckel’s rule i.e. molecule must have 4 n + 2 pi-electrons where n is an integer (i.e. n =   0 ,   1 ,   2 ,   3 ,   4 … etc.). The compound B follws the Huckel's rule. The acid-base reactions fast reactions. Compound ( A ) , also called squaric acid is a strong acid. So, above reaction proceeds very fast. All C - C bond lengths in B are same due to resonance. A shows tautomerism. A