Carefully read the following statements and conclusions. Consider the statements to be absolutely true, even if they contradict common facts. Based solely on the statements, determine which conclusion(s) logically follow.
Statements:
1. All flowers are plants.
2. No plant is a stone.
3. Some stones are heavy.
Conclusions:
I. No flower is a stone.
II. Some plants are not heavy.
III. Some flowers are heavy.
IV. Some heavy things are not plants.

​Statements:
1. All flowers are plants.
2. No plant is a stone.
3. Some stones are heavy.

​Conclusions:
I. No flower is a stone. (True, all flowers are plants and no plant is a stone, so that means no flower is a stone).
II. Some plants are not heavy. (False, no plant is a stone and some stone are heavy, so that means some plants are not heavy).
III. Some flowers are heavy. (False, ther is no direct or indirect relation between flowers and heavy).
IV. Some heavy things are not plants. (True, no plant is stone and some stones are heavy, so that means some heavy things are not plants).

So, ​Only I and IV follows.

Thus, correct option is (a).