This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
[{'content': 'Which is not true of hypocalcaemia: \nSelect and explain. \nA. Can occur in hypoparathyroidism, B. Latent tetany is seen, C. Prolonged QT intervala, D. Inverse relation with Me+ levels', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Answer is D (Inverse relation with Mg++ levels) : Magnesium levels usually bear a direct, not an inverse, relationship with serum Ca++ levels. Severe hypo-magnesemia is associated with hypocalcemia. Intracellular magnesium deficiency results in Hypocalcemia due to : - Impaired PTH secretion - Diminished responsiveness to PTH Hypoparathyroidism is a known cause of Hypocalcemia - Harrison QT interval on ECG is prolonged in Hypocalcemia and is shoened in hypercalcemia - Harrison Tetany is a recognized feature of hypocalcemia, but it may also occur with hypomagnesemia and respiratory alkalosis - Harrison', 'role': 'assistant'}]