This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Non communicable diseases, Subject name: Social & Preventive Medicine
Giving Benzathine penicillin in RHD is a type of - 
Select and explain. 
A. Primary prevention, B. Secondary prevention, C. Teiary prevention, D. Primordial prevention
B: Secondary prevention
Answer: B: Secondary prevention 
Explanation: park's textbook of preventive and social medicine 23rd edition. *in children :Im injection of benzyl pencillin 600000 units. *in adult :1.2 million units. *this must be continued for 5 years or until the child reaches 18 years.