This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
Which one of the following is not a special incidence rate- 
Select and explain. 
A. Attack rate, B. Secondary attack rate, C. Hospital admission rate, D. Standardized moality rate
D: Standardized moality rate
Answer: D: Standardized moality rate 
Explanation: Ans. is 'd' i.e., Standardized moality rate Special incidence rates i) Attack rate (case rate) ii) Secondary attack rate iii) Hospital admission rate