The right answer is A.
For animal cells X, histology makes it possible to visualize and analyze the morphology of an organ and to describe the specific structures of tissues / cells. Standard colorations to give the appearance such is shown in the picture:
* Hematoxylin-Eosin -Safran (HES).
* Masson's trichrome.
* Masson Goldner's Trichrome (MTG).
For the Y-cell, chloroplasts (small circles in green) are seen in green inside the cells, which proves that they are plant cells derived from a plant.
