# Grafting is not possible in monocot stems because they

$\begin{array}{1 1}(A)\;\text{lack cambium}\\(B)\;\text{have scattered vascular bundles}\\(C)\;\text{have parallel venation}\\(D)\;\text{are herbaceous}\end{array}$

Grafting is not possible in monocot stems because they have scattered vascular bundles
Hence (B) is the correct answer.