This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Biostatistics, Subject name: Social & Preventive Medicine
Descrete variability are all except- 
Select and explain. 
A. Color of skin, B. Boys in the class room, C. Obesity weight, D. Leukocyte count
A: Color of skin
Answer: A: Color of skin 
Explanation: Descrete variables: Have fixed values no intermediate values eg: no. of brothers, no. of children,etc