The correct option is
C Lenticels
- Pneumatophores are specialized root structures that grow out from the water surface and facilitate aeration necessary for respiration in hydrophytic trees.
- Lenticels, which are the medium for respiration, did this function.
- Lenticels are small openings (lenticels) through which air enters, passing through the soft spongy tissue to the roots beneath the mud.
So, the correct option is 'Lenticels'.