This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Medicine
[{'content': 'All are true about physiological murmur except \nSelect and explain. \nA. Only diastolic murmur, B. Midsystolic murmur, C. Present in child with anaemia, D. Not audible without stethoscope', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Midsystolic murmurs -- also known as systolic ejection murmurs, or SEM -- include the murmurs of aoic stenosis, pulmonic stenosis, hyperophic obstructive cardiomyopathy and atrial septal defects Innocent hea murmurs are heah murmurs that occur in patients with a normal hea structure. Iron-deficiency anaemia often causes, along with other symptoms, systolic hea murmurs and tachycardia. It appears in children of all ages representing a most common haematological paediatric disease Ref Harrison 20th edition pg 1434', 'role': 'assistant'}]