The transverse section of a plant shows following anatomical features :

a. Large number of scattered vascular bundles surrounded by bundle sheath. 

b. Large conspicuous parenchymatous ground tissue.

c. Vascular bundles conjoint and closed.

d.  Phloem parenchyma absent. 

Identify the category of plant and its part : 

1. Monocotyledonous root 

2. Dicotyledonous stem 

3. Dicotyledonous root 

4. Monocotyledonous stem