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
First quaile of the following data is - 1, 3, 4, 2 
Select and explain. 
A. 1, B. 3, C. 1.5, D. 4
C: 1.5
Answer: C: 1.5 
Explanation: Ref: Parks 23rd edition Arrange the values in ascending order 1,2,3,4 Median= 2.5, that is Q2 Q1= middle of 1 and 2 , that is 1.5