What is right answer??

Question

< > important text < strong >
< >subscripted text </ >

Answer 1

<strong>Spam</strong>
_Spam

Answer 2

thank Valentin

Answer 3

<strong>important text</strong>
_{subscripted text}

Answer 4

<
strong
> important text <
/
strong>
<sub
> subscripted text </sub
>