The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A 34-year-old man comes to the physician because of frequent headaches and blurry vision during the past 4 months. He has also had difficulties achieving an erection over the past few weeks. Physical examination shows a temporal visual field deficit bilaterally. An MRI of the brain shows an intrasellar mass. The mass is most likely derived from which of the following types of cells?   (A) Thyrotrophs   (B) Lactotrophs   (C) Somatotrophs   (D) Gonadotrophs
['(B) Lactotrophs <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Thyrotrophs \n (B) Lactotrophs \n (C) Somatotrophs \n (D) Gonadotrophs <> possible answers', '  A 34-year-old man comes to the physician because of frequent headaches and blurry vision during the past 4 months. He has also had difficulties achieving an erection over the past few weeks. Physical examination shows a temporal visual field deficit bilaterally. An MRI of the brain shows an intrasellar mass. The mass is most likely derived from which of the following types of cells? <> context@']