The photomicrographs show a cross-section through the lining of part of the respiratory system.
Which statements are correct?
1 Goblet cells are visible between squamous epithelium cells.
2 Smooth muscle is visible.
3 The section cannot be from a bronchiole as cartilage is visible.

1 )
1, 2 and 3
2 )
1 and 2 only
3 )
1 and 3 only
2 and 3 only
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