This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: obstetrics,pediatrics and geriatrics, Subject name: Social & Preventive Medicine
Road to health card' top line is - 
Select and explain. 
A. 3rd percentile, B. 50th percentile, C. 80th percentile, D. 97th percentile
B: 50th percentile
Answer: B: 50th percentile 
Explanation: Road to health card top line indicates 50 percentile. REF. PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICAL 21ST EDITION. PAGE NO - 502