<prompt> Ectopic ACTH production is seen inSmall cell carcinoma is lungAnaplastic carcinoma of lungSquamous cell carcinoma of lungAdenocarcinoma of cerebellum  <response>: Ans. is a i.e, Small cell carcinoma of lung Ectopic ACTH is produced by Small cell carcinoma of lung most common Carcinoid tumors Medullary Carcinoma of thyroid Islet cell tumors of pancrease 