Statements: All branches are flowers. All flowers are leaves.
Conclusions:
I. All branches are leaves.
II. All leaves are branches.
III. All flowers are branches.
IV. Some leaves are branches.

None follows

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Only I and IV follow

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Only II and III follow

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All follow

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Solution

The correct option is B Only I and IV follow
Since both the premises are universal and affirmative, the conclusion must be universal affirmative and should not contain the middle term. So, it follows that 'All branches are leaves'. Thus, I follows. IV is the converse of this conclusion and so it also holds.

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Similar questions

Some statements are given, followed by some conclusions. Consider the statements to be true even if they seem to be at variance from commonly known facts. Decide which of the given conclusions follow from the given statements.
Statements:
Some seeds are flowers.
All flowers are trees.
All trees are leaves.
Some leaves are branches.

Conclusions:
I. Some branches are flowers.
II. Some leaves are seeds.
III. Some leaves are flowers.

In each of the following questions two statements followed by four conclusions numbered I, II, III and IV are given, You have to take the two given statements to take true even if they seem to be at variance from commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the statements.

Statements
All branches are flowers.
All flowers are leaves.

Conclusions
I. All branches are leaves.
II. All leaves are branches.
III. All flowers are branches.
IV. Some leaves are branches.

Q. Statements: Some desks are fruits.
All fruits are flowers.
No flower is a branch.
Some branches are roots.
Conclusions I: Some roots are flowers.
Conclusions II: No branches are desks.
Conclusions III: Some flowers are desks.
Conclusions IV: Some desks are branches.

Q. Statements : All leaves are roots.
Some leaves are branches.
Conclusions : I. Some branches are not leaves.
II. Atleast some roots are branches.

Statement

All flowers are goats.

No goat is branch.

Some branches are roots.

Conclusions

I. Some roots are flowers.

II. No roots is flower.

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Statements: All branches are flowers. All flowers are leaves.Conclusions: I. All branches are leaves.II. All leaves are branches.III. All flowers are branches.IV. Some leaves are branches.

Statements: All branches are flowers. All flowers are leaves.
Conclusions:
I. All branches are leaves.
II. All leaves are branches.
III. All flowers are branches.
IV. Some leaves are branches.