This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Biostats, Subject name: Social & Preventive Medicine
A Doctor is taking history from a Diabetes patient and decides to make a cha to assess joint involvement/ which cha should 
Select and explain. 
A. Pie cha, B. Venn diagram, C. Histogram, D. Tree diagram
D: Tree diagram
Answer: D: Tree diagram 
Explanation: A tree diagram is simply a way of representing a sequence of events along with their probabilities In the given question, Branches can indicate different joints involvement in the case of Diabetes: Fuher branches can indicate if test conducted was positive or not It can fuher help in Decision making for treatment joint wise and overall