<prompt> Gemcitabine is used mainly in which cancer -ColorectalBreastPancreaticCranipharyngioma  <response>: Ans. is c i.e., Pancreatic o Drug of choice for brain tumorso Drug of choice for pancreatic Ca.o Drug of choice for choriocarcinomao Drug of choice for multiple myeloma- Nitrosoureas- Gemcitabine- Methotrexate- Melphalan 