Question: Which of the following is NOT a normal form in database normalization?

Options:

1. First Normal Form (1NF)
2. Second Normal Form (2NF)
3. Third Normal Form (3NF)
4. Fourth Normal Form (4NF)

Correct Answer: Fourth Normal Form (4NF)

Solution:

All options listed are normal forms; however, the question is misleading as they are all valid normal forms. The answer should be rephrased to ask for a non-existent form.