Ans. is 'c' i.e., Serum sickness Like Illness SSLI occurs from an abnormal inflammatory reaction that occurs in response to defective metabolism of drug by products generated during pharmacotherapy. Therefore, it is also called serum sickenss like drug reaction (SSLDR). SSLDR is must commonly seen after exposure to cefclor, but other drugs including penicillins, tetracyclines, ciprofloxacin, NSAIDs, sulfonamides, barbiturates, carbamazepine, propranolol, thiouracil and allopurinol, have also been implicated.