Is it 1. Two bags of apples, 2. Two bags of apples or 3. Two bag of apples? Or can all three be used in different situations?

Is it 1. Two bags of apples, 2. Two bags of apples or 3. Two bag of apples? Or can all three be used in different situations?

Is it 1. Two bags of apples, 2. Two bags of apples or 3. Two bag of apples
Or can all three be used in different situations?
A: two bags of apples must be right, because bag and apple are countable nouns
Two bag of apples is definitely wrong. Because bag is a countable noun and there are two
Two bags of apple, hard to say. For example, chicken, fish, as chicken, fish is countable, has plural form. As chicken, fish, there is no fixed shape, uncountable noun
If you think about it this way, you can cut the apples that can be counted one by one into different sizes, maybe peeled and ready to be canned. Now you can pack them temporarily. I think you can express it this way to show the difference between the two generations of pears
Of course, this is the context I came up with. It's rare