Which of the following is the correct way to filter the content for a few posts?

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Which of the following is the correct way to filter the content for a few posts?
Answers:
1.      By using apply_filters(filter,postId)
2.      This is not possible in wordpress
3.      Can create filter for posts in a specific wordpress category

4.      Passing arguments into the_content()
GA
Gaurav Arora, Digital Media Lead. 10+ years running paid media and tracking for brands in the USA, UK and Canada.