Block Level Elements inside Inline elements [duplicate]

Answer 1

An element that is inline elements should not contain block elements. Block elements can contain block and/or inline elements while inline elements can only contain other inline (including inline-block, such as ) elements.

You can of course do it anyways, since the graphical representation will be pretty consistent across browsers. It's still not something I'd recommend though, and can't really think of a reason to do it either.