Html elements iframe, strong, and h4

iframe element Defines an inline frame (ie a frame embedded in a document), strong element Specifies that the enclosed text should be rendered in the browser as "strong" (usually bold) text, h4 element Heading Level 4. These elements allows child elements from interactive, embedded, heading, sectioning, phrasing, and metadata content categories.

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iframe iframe and strong, iframe, strong, and h4

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