<prompt> Pancytopenia with hypocellular bone marrow seen in:Fanconis anemiaParoxysmal nocturnal hemoglobinuriaHairy cell leukemiaMyelopthisis  <response>: a. Fanconis anemiaRef: Nelsons 20e p 2362-2371, Chai 8e p 345-347Fanconis anemia shows pancytopenia with hypocellular bone marrow while others in the options cause hypercellular bone marrow. 