250.Incidence of natal and neonatal teeth is estimated to be

a.1:2000 and 1:30,000
b.1:1000 and 1:30,000
c.1:3000 and 1:20,000
d.1:4000 and 1:20,000

Ans-b.1:1000 and 1:30,000

249.Syndromes associated with both hyperdontia as well as hypodontia are all except

a.crouzon's disease
b.Down's syndrome
c.Hallerman streiff syndrome
d.Reiger syndrome

Ans-d.Reiger syndrome

248.First clinical sign of Vitamin A deficiency

a.corneal xerosis
b.conjuctival xerosis
c.Bitot's spots
d.Night blindness

Ans-b.conjuctival xerosis

Explanation-ref park 18th ed pg 443