Which one is the principle of inclusion/exclusion of two sets intersecting each other?

Which one is the principle of inclusion/exclusion of two sets intersecting each other?

1. ক) |A ∪ B| = |A| + |B| − |A ∩ B|
2. খ) |A ∪ B| = |A| + |B|
3. গ) |A ∩ B| = |A| + |B|
4. ঘ) |A ∩ B| = |A| − |B| + |A ∪ B|