Direction: In each of the question below are Four statements following by Four conclusions numbered I, II, II and IV. You have to take the Four given statements to be true even if they seem to be at variance with commonly known facts and then decide which of the given conclusion logically follows from the two statements disregarding commonly known fact.
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Statement:
Some doors are walls. All walls are floors. All floors are rooms. Some rooms are windows.
Conclusions:
I. All walls are rooms.
II. Some rooms are doors.
III. Some rooms are doors.
IV. Some floors are doors.
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- None follows
- Only I & II follows
- Only II & III follows
- Only I, III & IV follows
- All follow
Correct Option: D
All walls are floors + All floors are rooms = A + A = A = All walls are rooms Hence I follows. Some doors are walls + All walls are floors = I + A = I = Some doors are rooms → conversion → Some rooms are doors (I). Hence II follows. Conversion of gives us III. Some doors are walls + All walls are floors = I + A = I = Some doors (I) Hence IV follows.
