LIC AAO Model Paper 5

Conclusion (P) is the Conclusion I.
Venn diagrams of “All plants are trees”:

Venn diagrams of “Some trees are weeds”:

or
Combine diagrams II and V

It implies that “All plants are weeds."
Now
All plants are weeds.
All weeds are shrubs.
A + A ⇒ A - type of Conclusion
“All plants are shrubs.”
Therefore, Conclusion II follows.