Statements All trains are buses All buses are rickshaws No rickshaw is a plane Conclusions ...........

Logical Reasoning (RBI) Syllogism

In these questions, two/three statement followed by two conclusions numbered I and II have been given. You have to take the given statements to be true even if they seem to be at variance from commonly known facts and then decide which of the given conclusions logically follows the given statements? Given answer :
A. If only conclusion I is true
B. If both conclusions I and II are true
C. If either conclusion I or II is true
D. If only conclusion II is true
E. If neither conclusion I nor II true Statements :
Some planets are stars. All stars are comets. No comet is an astronaut.

Statements : All trains are buses. All buses are rickshaws. No rickshaw is a plane.

Conclusions :

I. All trains are rickshaws.

II. All plains being trains is a possibility.

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Explanation:

The least possible diagram is shown as below:

Conclusions :
I. All trains are rickshaws → It is true. Hence, conclusion I follows.
II. All plains being trains is a possibility → This is not possible. Hence, conclusion II does not follow. Hence, only conclusion I follows.