According to the given statement,
1. All balls are plastics items.
2. All utensils are balls.
The least possible Venn diagram is as follows:
Conclusion: I. All utensils are plastic items. (True, since according to the statement, all utensils are ball and all balls are plastic, so all utensils are plastic.)
II. Some balls are not plastic items. (False, since according to the statement, all balls are plastic, so some balls cannot be plastic is false)
Hence, the correct answer is "Only conclusion I follows"