One of the following is absent in the phloem of mostly monocots.
B. Phloem parenchyma
Reason: Phloem parenchyma is ordinary living elongated parenchyma cells having abundant plasmodesmata. They store food, resins, latex, mucilage, etc. The cells help in slow conduction of food, especially to the sides. Phloem parenchyma is absent in most of the monocots and some herbaceous dicots.