Which type of plant cell is undifferentiated? meristem cells flower and stem cells leaf and root cells phloem and xylem cells

Meristem cells

Explanation:

Meristems are a group of cells which have capacity to divide throughout their life. The cells of meristem are small, thin walled, dense with large nucleus. Vacuoles are either small or absent. The intercellular spaces are absent. These cells undergo mitotic division form undifferentiated cells or the individual cells have distinguishing features. Meristem may be apical, intercalary or lateral.    

i think that the best answer would be c.

tell me if im wrong : )

the real answer is b. scintillation counter