In Internal structure of an organ of angiospermic plant the following features are seen.
A. More cortex than stele    
B. Pericycle is involved in vascular cambium formation.
C. Some barrel shaped cells do not have casparian thickenings.
The above features are seen in  

 

• A

  dicot stem   

• B

  dicot root     

• C

  monocot stem    

• D

  monocot root