<prompt> Incidence of Pneumocystis jiroveci pneumonia has declined in recent times due to which of the following?Better living conditionsDecrease in the incidence of HIV infectionUse of combination AStronger immunity of the coho  <response>: Answer- C. Use of combination APneumocystis pneumonia PCP, once the hallmark of AIDS, has dramatically declined in incidence following the development of effective prophylactic regimens and the widespread use of cA. 