The correct option is A A- 2, B- 5, C- 1, D- 3, E- 4
In flowering plants, bordered pits have an important role in allowing the flow of water from adjacent tracheary elements in flowering plants. Nevertheless, the cavity with thick walls is called the pit chamber, the pit aperture is the narrow, linear or lenticular opening of this chamber into the cell lumen. The membrane that bordered is called as the torus.
Therefore, the correct answer is option A.