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Q.

Select the option that gives the number of various types of teeth in a complete set of permanent teeth in an adult human.

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a

4 incisors, 8 canines, 8 premolars and 12 molars

b

8 incisors, 4 canines, 8 premolars and 12 molars

c

8 incisors, 8 canines, 4 premolars and 12 molars

d

8 incisors, 4 canines, 12 premolars and 8 molars

answer is B.

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Detailed Solution

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The dental formula of adult dentition in human is 21232123. The dental formula summerises the number of each type of tooth (incisor, canine, premolar, molar) in each half of each jaw. This dental formula may also be represented as  i 22, c 11,pm22,m33. The number of incisors is (2+2)2 = 8; the number of canines is (1+1)2 = 4; the number of premolars is is (2+2)2 = 8; the number of molars is is (3+3)2 = 12.

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