Pernicious anaemia is caused by the deficiency of . . . . . . vitamin.

  • A
    $B_{1}$
  • B
    $B_{12}$
  • C
    $C$
  • D
    $D$

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Food is masticated with the help of which part of teeth?

Lacteals are present in the mucosa of . . . . . . .

Which one of the following correctly represents the normal adult human dental formula?

White coating material called enamel covers . . . . . . of the tooth.

The given figure shows a cross-section of the alimentary canal. Identify the layers labeled $P$ and $Q$.

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