The set X = {a, b, c, d} has a collection of subsets T = {∅, {a}, {b}, {a, b}, {c, d}, X}. Is (X, T) a topological space?
1
Yes, because all elements are included in the subsets.
2
Yes, because the intersection condition
3
No, because the union condition
4
No, because the intersection condition
5
Question Not Attempted