Question: Select the expression that causes a MySQL error. Select all that apply. Pick ONE option 1 . SELECT AVG ( id ) FROM categories 2

Select the expression that causes a MySQL error.
Select all that apply.
Pick ONE option
1. SELECT AVG( id) FROM categories
2. SELECT AVG( id) FROM categories GROUP BY type
3. SELECT 'average', AVG( id) FROM categories GROUP BY 1
4. None of the above, all expressions are correct

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