Correct option is D
Statements:
1. All slippers are knives.
2. Some knives are rats.
3. Some rats are pizzas.
From the given statements possible Venn diagram will be.

Conclusions:
I. Some pizzas are slippers. (False, there is no direct relation between pizzas and slippers).
II. Some rats are slippers. (False, there is no direct relation between rats and slippers).
Neither conclusion I nor II follows.
Thus, correct option is (d).