question: A 9-year-old child reports to the office with a maxillary permanent central incisor having a small hypoplastic spot on the labial surface as the chief complaint. The child gives a history of fall when he was 4 years old, which resulted in a fracture of his maxillary primary incisor. The most probable diagnosis is
opa: Hypoplasia due to systemic disease
opb: Fluorosis
opc: Turner's tooth
opd: Amelogenesis imperfecta