What to use to set an inline comment section in a html (NOT inside the element) What to use to set the block section comment section inside the element in a html (10pts)

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What to use to set an inline comment section in a html (NOT inside the element)  What to use to set the block section comment section inside the element in a html (10pts)

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What to use to set an inline comment section in a html (NOT inside the element)? What to use to set the block section comment