In this question, three statements are given followed by three conclusions. Choose the conclusion(s) which best fit(s) logically.
Statements:
1) Some houses are chairs.
2) All windows are doors.
3) All houses are windows.
Conclusions:
I. Some doors are windows.
II. Some chairs are houses.
III. Some windows are chairs.

Correct option is D

From the above statements we draw following diagram

Conclusions:
I. Some doors are windows. (True, some parts of doors covers windows too)
II. Some chairs are houses. (True, some  area of chairs is also some part of house)
III. Some windows are chairs. (True, same above reason)
From the above, all conclusions follow.