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: Social & Preventive Medicine
[{'content': 'The age and sex structure of a population may be described by a \nSelect and explain. \nA. Life table, B. Correlation coefficient, C. Population pyramid, D. Bar chart', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Population pyramid: (age-sex pyramid or age-structure diagram) Is a graphical illustration that shows the distribution\xa0of various age groups in a population which normally forms the shape of a pyramid\n\n– Double Histogram: 2 back-to-back histogram graphs\n1. one showing the number of males and\n2. one showing females in a particular population (Males are conventionally shown on left and females on right)\n– The population (%) is plotted on the X-axis and age on the Y-axis (in 5-year age group intervals)', 'role': 'assistant'}]