Set theory II

Which of the following sequence of set operations counts the number of elements that are in exactly one of $A$, $B$ or $C$?"

Options:

1. $|A\cap B|+|B\cap C|+|C\cap A|-3(|A\cap B\cap C|)$

2. $|A|+|B|+|C|-2(|A\cap B|+|B\cap C|+|C\cap A|)+3|A\cap B\cap C|$

3. $|A\cap B|+|B\cap C|+|C\cap A|-2|A\cap B\cap C|$

4. $|A|+|B|+|C|-|A\cap B|-|B\cap C|-|C\cap A|+|A\cap B\cap C|$

5. $|(A\cap B\cap C)\cup(A\cap B^{C}\cap C^{C})\cup(A^{C}\cap B\cap C^{C})\cup(A^{C}\cap B^{C}\cap C)|$

6. |$A\cup B\cup C$ |