This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of pituitary gland, Subject name: Medicine
[{'content': 'For galactorrhea and amenorrhea syndromes, what is the investigation in addition to serum prolactin? \nSelect and explain. \nA. LH, B. TSH, C. Urinary Keto-steroids, D. HCG', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In patients with Iodine deficiency Low T4/T3 results in TSH || by Feedback mechanism & to ||TSH the TRH is also elevated(||) Now this ||TRH will increase both TSH and Prolactin production. Therefore Hyperprolactinemia resulting in Galactorrhea can also be seen in Patients with thyroid malfunction.', 'role': 'assistant'}]