Read the following statements and find out the incorrect statement regarding human being

a) The alimentary canal begins with an anterior opening - the mouth, and it opens out posteriorly through the anus.

b) The mouth leads to the buccal cavity or oral cavity. The oral cavity has a number of teeth, a muscular tongue and three pairs of salivary glands.

c) The first set of teeth is called temporary milk or adult teeth which are replaced by a set of permanent or deciduous teeth.

d) The upper surface of the tongue has small projections called taste buds.