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 cha was given by - 
Select and explain. 
A. John snow, B. David Morley, C. Koch, D. Henrey Ducant
B: David Morley
Answer: B: David Morley 
Explanation: Road to health cha was designed by David Morley. REF. PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICAL 21ST EDITION. PAGE NO - 502