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 of the following is impoant in calculaton of pearl index - 
Select and explain. 
A. Number of aboions, B. Total accidental pregnancy, C. Socioeconomic status, D. Total gestational period
B: Total accidental pregnancy
Answer: B: Total accidental pregnancy 
Explanation: Ans. is 'b' i.e., Total accidental pregnancy