A. 20 months
B. 18 months
C. 24 months
D. 28 months

A. 3-4 months
B. 4-5 months
C. 5-6 months
D. 6-7 months

A. Premolars, incisors and 1st molars
B. Canine and 2nd molars
C. Canines, premolars and2^ndmolars
D. Incisors and 1st molars

A. 8 months
B. 18 months
C. 8 years
D. 16 years

A. 3 years
B. 1 years
C. 2 years
D. 1 month

A. 2 years
B. 4 years
C. 6 years
D. 8 years

A. One year
B. Two years
C. Three years
D. Four years

A. 12 CDE6
B. 12C456
C. 123DE6
D. 123456

A. Maxillary first
B. Maxillary second
C. Mandibular first
D. Mandibular second

A. From birth to 11 years
B. From 6 months to 11 years
C. From 6 months to 6 years
D. From 6 years to 11 years