Q. 58 Let N be the set of natural numbers. Consider the following sets,
P: Set of Rational numbers (positive and negative)
Q: Set of functions from {0, 1} to N
R: Set of functions from N to {0, 1}
S: Set of finite subsets of N
Which of the above sets are countable?
(A) Q and S only
(B) P and S only
(C) P and R only
(D) P, Q and S only
Answer: (D)
Explanation:
