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
Number of family member is a - 
Select and explain. 
A. Qualitative variable, B. Discrete variable, C. Continuous variable, D. Categorial variable
B: Discrete variable
Answer: B: Discrete variable 
Explanation: Discrete variable: Fixed values no intermediate values eg: no of girls, no. of children, etc. Continuous variable: can take intermediate values eg:weight, height, etc