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For writing chemical formula of water which tag will be used?

a) <sup>
b) <sub>
c) <br/>
d) <ul>

Answer: b
Explanation: The <sub> element is used to contain characters that should be subscript. It is commonly used with foot notes or chemical formulas. E.g. H20, <sup> is use for superscript, <br> is for horizontal break, <ul> is for unordered list.

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