In the given diagram:

• A (Pinnately compound leaf – Neem):
  Leaflets are arranged along a central axis (rachis). This arrangement is characteristic of pinnately compound leaves, as seen in neem.

• B (Palmately compound leaf – Silk cotton):
  All leaflets arise from a single point at the tip of the petiole, resembling fingers of a hand. This is typical of palmately compound leaves, as seen in silk cotton.