Social & Preventive Medicine obstetrics,pediatrics and geriatrics 09a1c9f5 Road to health card' top line is - A 3rd percentile B 50th percentile C 80th percentile D 97th percentile High-Yield Explanation Road to health card top line indicates 50 percentile. REF. PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICAL 21ST EDITION. PAGE NO - 502