<prompt> Which of the following is the most common site for the carcinoma of pancreas -HeadAmpullaBodyTail  <response>: Most common site for carcinoma pancreas is head. The distribution as follows:Head 75 Body 15 Tail 10Ductal adenocarcinoma is the most common variety 90Also know,Risk factors for pancreatic CaCigarette smoking is the most consistent risk factor.As in other gastrointestinal cancers, diets high in fat and low in fibre, fruits and vegetables are thought to be associated with an increased risk.Other risk factors are :Chronic pancreatitisDiabetesObesityAlcohol abuse or cholelithiasis are not risk factors for pancreatic cancer. 