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
Under RCH programme, intervention done in selected districts 
Select and explain. 
A. Treatment of STD, B. Immunization, C. ORS therapy, D. Vitamin A supplementation
A: Treatment of STD
Answer: A: Treatment of STD 
Explanation: None