Given below are two premises, with four conclusions drawn from them (taking singly or together); which conclusions are validly drawn ? Select the correct answer from the codes given below :
Premises : (i) All bats are mammals.
(ii) Birds are not bats.
Conclusions : (a) Birds are not mammals.
(b) Bats are not birds.
(c) All mammals are bats.
(d) Some mammals are bats.
Codes :
(A) (a), (b) and (d) (B) (b) and (d)
(C) (a) and (c) (D) (b), (c) and (d)
Premises : (i) All bats are mammals.
(ii) Birds are not bats.
Conclusions : (a) Birds are not mammals.
(b) Bats are not birds.
(c) All mammals are bats.
(d) Some mammals are bats.
Codes :
(A) (a), (b) and (d) (B) (b) and (d)
(C) (a) and (c) (D) (b), (c) and (d)