What is the type of hypodermis present in the stem of maize?

The centrifugal arrangement of the xylem is called

Which of the following is not true for the vascular bundles of monocotyledonous stems?

Which of the following is absent in the primary and secondary structure of the stem of $Pinus$?

In $Barley$ stem,vascular bundles are:

The transverse section of a plant material shows the following anatomical features: $(a)$ the vascular bundles are conjoint,scattered,and surrounded by sclerenchymatous bundle sheaths,$(b)$ phloem parenchyma is absent. What will you identify it as?