Which of the following propostions are so related that they cannot both be false, although they may both be true?
A. All cricketers are cheerful persons.
B. No cricketers are cheerful persons.
C. Some cricketers are not cheerful persons.
D. Some cricketers are cheerful persons.
Choose the correct answer from the options given below:
1
A and B only
2
B and D only
3
A and C only
4
C and D only