Four types of cell in the gas exchange system are listed.
J- alveolus epithelium cell
K- ciliated cell
L- goblet cell
M- smooth muscle cell
The ticks (√) in the table show specialised features of three of these types of cell.
Which row correctly matches the specialised feature with the correct cell?

1 )
A
2 )
B
C
4 )
D
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