All windows are doors. No door is wall
Conclusions:
1. No window is wall
2. No Wall is door	Choose the correct choice from the following options.
A) Both 1 and 4 follow	B) Both 1 and 3 follow	C) Both 4 and 1 follow	D) Both 1 and 2 follow	E) Both 1 and 6 follow
Explanation:   Since both the premises are universal and one premise is negative, the conclusion must be universal negative. Also, the conclusion should not contain the middle term. So, 1 follows.   However, 2 is the converse of the second premise and thus it also holds.   Answer: Both 1 and 2 follow
<result>D</result>
All windows are doors. No door is wall
Conclusions:
1. No window is wall
2. No Wall is door