Identify the labeled parts (A, B, C, I, II, III, IV, V) in the diagram illustrating vegetative reproduction in plants.

Here are the answers to the questions based on the provided diagram:

a)
A: Runner (or Stolon)
B: Rhizome
C: Rhizome (Note: The depiction of C is highly stylized and resembles an insect larva, but based on the question's premise that it is a "propagating material... used in vegetative reproduction in plants," it is interpreted as a rhizome due to its segmented, elongated form, which can represent nodes and internodes.)

b)
I: Node (or Bud)
II: Runner (or Stolon)
III: Shoot (or Leaf)
IV: Rhizome
V: Bud (or Growing tip)