A development disturbance in the enamel of mandibular first molar crown usually occurs between which of the following ages: (A) 8 months prenatal to one year postnatal, (B) Birth to 3 years postnatal, (C) 3 years postnatal to 5 years postnatal, (D) 6 years postnatal to 8 years postnatal
Answer is B. None