Phloem parenchyma is absent in
A.Dicot root – phloem parenchyma is present.
B.Dicot leaf – Phloem parenchyma is present.
C.Monocot stem – phloem parenchyma is absent.
D.Dicot stem – Phloem parenchyma is present.
So, the correct answer is 'Monocot stem'.