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
An accustomed way of doing things is known as: 
Select and explain. 
A. Habit, B. Custom, C. Belief, D. Ritual
A: Habit
Answer: A: Habit 
Explanation: Habit is an accustomed way of doing things. It is the usual way of action that can be performed without thinking. Chapter: Medicine and social sciences. Ref: Park 21st edition, page: 627.