1.

{:(1.,"Acyclic compounds",(a),"Cyclobutene"),(2.,"Alicyclic compounds",(b),"Ethene"),(3.,"Homocyclic aromatic compounds",(c),"Pydridine"),(4.,"Heterocyclic compounds",(d),"Benzene"):}

Answer»


ANSWER :B, a, d, C


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