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: Gynaecology & Obstetrics
[{'content': 'Smallest diameter of pelvis is? \nSelect and explain. \nA. Interspinous diameter, B. True conjugate, C. Diagonal conjugate, D. Inteuberous diameter', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Interspinous diameter REF: Clinical Obstetrics 10th edition by S. Gopalan, Sarala & Jain, Vanita Page 4, Manual of Obstetrics, 3e by Shirish N Daftary Page 11-12, Manual Of Obstetrics (2Nd Edition) by Daftary Page 16-18 "Interspinous diameter (transverse diameter of midpelvis = 10 cm or somewhat more) is the smallest diameter of pelvis" REF: Williams\'s obstetric 22nd edition page 34', 'role': 'assistant'}]