Final answer:
The correct answer is option b, which states that the intersection of sets A (even natural numbers) and B (odd natural numbers) is the empty set because these sets are mutually exclusive, containing no overlapping elements.
Step-by-step explanation:
The question concerns the sets of even and odd natural numbers. These two sets are mutually exclusive because a natural number cannot be both even and odd. The correct statement among the given options is b. An B=0, which means the intersection of set A (even natural numbers) and set B (odd natural numbers) is the empty set, as there are no elements that both sets share. Options a, c, and d are incorrect because 39 is an odd number and does not belong to A, which is the set of even numbers; 48 is an even number and does not belong to B, which is the set of odd numbers; and A union B does not equal A because the union would include both even and odd numbers, whereas A contains only even numbers.