RRB NTPC · Question 53
Below are the statements and some of their conclusions. You have to follow the given statements correctly even if they seem to be at variance from commonly known facts. Statement: All chairs are windows. No window is a door. Conclusion: I. Some chairs are doors. II. No door is window. Decide which of the following conclusions logically follows from the given statements. A. Only conclusion I follows. B. Only conclusion II follows. C. Neither I nor II follows. D. Both I and II follow.
Show answer & explanation
Answer: (C) B
Explanation
All chairs are windows and no window is a door, so no chair is a door (I fails) and 'no door is a window' follows by conversion (II follows).