Correct option is A
Given the statements:
All foxes are cats.
No cat is a bear.

Let us evaluate the conclusions:
Conclusion (I): No fox is a bear. Since the entire group of "foxes" lies inside "cats", and "no cat is a bear", it is completely impossible for any fox to be a bear. Therefore, this conclusion definitely follows.
Conclusion (II): Some bears are cats. The second statement clearly states that "No cat is a bear," which means no bear can be a cat either. Therefore, this conclusion does not follow.
Final Answer Statement:
Only conclusion (I) follows.
Conclusion:
Thus, the correct option is (A).