The BCG vaccine is typically given to newborns, so the correct answer is (c) Newborn. It is administered shortly after birth, usually within the first few days to weeks of life. This timing is optimal for providing protection against tuberculosis (TB) in infancy, as newborns are at increased risk of severe forms of TB if exposed to the bacterium. The BCG vaccine helps prevent severe forms of TB, such as TB meningitis and miliary TB, in young children. In some countries, the BCG vaccine may also be given to older children and adults at high risk of TB infection or complications.