Ans. is 'd' i.e., Penicillin G . Information in this question are :- i) Patient is sweage worker (high risk group for developing leptospirosis). ii) Jaundice and elevated BUN & creatinine - > Hepatorenal syndrome (Weil's disease). . So, presence of fever, jaundice and elevated BUN & creatinine in a sewage worker ( contact with rat urine) suggests a diagnosis of Weil's disease. . Penicillin G (intravenous) is the recommended agent.