In a 3-year-old child, most common cause of hepatitis B is?In a 3-year-old child, most common cause of hepatitis B is?  mcq  given below:


Q. In a 3-year-old child, most common cause of hepatitis B is?

(a) Pin prick
(b) Saliva exchange
(c) Perinatal
(d) Blood transfusion

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