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Statements: Some trees are bushes.
All flowers are bushes.
Conclusions: I) At least some bushes are trees.
II) At least some flowers are trees.
A. If only conclusion I follow.
B. If only conclusion II follows.
C. If either conclusion I or II follows.
D. If neither conclusion I or II follows.
E. If both conclusions I and II follow

Answer
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Hint:Based on the growth of a plant, they are classified into different groups like trees, herbs, shrubs, climbers, creepers, etc. Shrubs or bushes consisting of flowering plants that can be planted in a garden as they are short, trees are huge.

Complete answer:There are a wide variety of plants living in different parts of the planet, some are found on land (terrestrial plants) and some deep inside the oceans (aquatic or marine plants). All these have the same body parts and functions with the varying root system, shoot system, seeds, etc. Hence, the plants are classified on the basis of their height, life cycle, and other factors. Based on the height they are classified as:
Herbs: the shortest of all are the herbs. They have soft, delicate, green stems and are branchless. Herbs can be either annual i.e. complete life cycle in one year, or perennial i.e. complete life cycle in more than a season; or biennial i.e. takes two years to complete life cycle (mostly flowering plants). Ex. Tomato.
Shrubs: they are medium-sized and shorter than trees. They have an average height of about 6-10m. They have a woody stem which is hard but flexible. Their life cycle depends on the type of species. Ex. Rose.
Trees: trees are big, tall, and woody with hard stems and trunks. The lifespan of trees is very long for many years. Ex. Banyan.
In any plant, all the structures like stem, root, leaves, fruits, flowers are organs of the plant body which are divided into two groups. Sexual reproductive parts like flowers, fruit, and seeds produce seeds; vegetative reproductive (Asexual reproduction) parts are rhizome, bulb, etc.
Here, we can say from the above statements that some trees are bushes but flowers cannot be bushes as it is a reproductive organ in a plant and not a plant.

Hence, the correct option will be option A- If the only conclusion I follow.

Note: Whenever the term “at least” is used in a sentence, it means minimum limit for example- When we say at least 2 it means minimum 2 i.e. more than or equal to 2. When the term “at most” is used, it means maximum limit, for example, if we say at most 2 it means, maximum 2 i.e. less than or equal to 2.