<prompt> A 50-year-old male had fever for 1 week, abdominal distention and loss of appetite. It is not responding to antibiotics and antimalarials. Widal test is negative but RK39 dipstick test was positive. Which drug can be used?BedaquilineLinezolidFluconazoleAmphotericin B  <response>: Ans. D Amphotericin BRef: KDT 8th902RK 39 dipstick test is positive in infection with Leishmania. So, it is a case of visceral Leishmaniasis or Kala azar. The drug of choice is amphotericin B. 