The correct option is
B Breathing pores
Pneumatophore is a specialized ‘breathing’ root developed in some plant species that grow in waterlogged or strongly compacted soils, e.g., mangroves. The aerial part of the root contains many pores, enabling gas exchange with the atmosphere. Internally, a well-developed system of intercellular spaces allows gases to diffuse throughout the submerged portion of the roots.
Therefore, the correct answer is option A.