Which of the following propositions are so related that one is the denial or negation of the other?
A. All electrical vehicles are environment friendly transportation medium.
B. Some electrical vehicles are environment friendly transportation medium.
C. No electrical trains are environment friendly transportation medium.
D. Some electrical vehicles are not environment friendly transportation medium.
Choose the correct answer from the options given below:
1
A and C only
2
A and D only
3
B and D only
4
C and D only