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
All are true about physiological murmur except 
Select and explain. 
A. Only diastolic murmur, B. Midsystolic murmur, C. Present in child with anaemia, D. Not audible without stethoscope
A: Only diastolic murmur
Answer: A: Only diastolic murmur 
Explanation: 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