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
All are true about data diagrams except:- 
Select and explain. 
A. Frequency distributions are usually illustrated by histograms, B. Frequencies are commonly illustrated by bar cha, C. Bimodal frequency distribution has two tails and one peak, D. Frequency polygon is useful when comparing two or more frequency distributions by drawing them on the same diagram
C: Bimodal frequency distribution has two tails and one peak
Answer: C: Bimodal frequency distribution has two tails and one peak 
Explanation: - Bimodal frequency distribution: * Bimodal frequency distribution has two tails and two peaks. - Frequency distributions are usually illustrated by histograms. - Frequencies are commonly illustrated by bar cha . - Frequency polygon is useful when comparing two or more frequency distributions by drawing them on the same diagram.