This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Maternal and child care, Subject name: Social & Preventive Medicine
In GOBI, O stands for 
Select and explain. 
A. Oral hygiene, B. Oral rehydration, C. Oral drugs, D. None of the above
B: Oral rehydration
Answer: B: Oral rehydration 
Explanation: G - growth monitoring O - oral rehydration B - breast feeding I - immunization