<em>A law is a </em><em>scientific statement </em><em>which is defined as a statement of fact and is generally accepted to be true or universal because it has always been </em><em>observed to be true.
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<u>Explanation:</u>
Among the options it is only a <em>law that is accepted to be universal.</em> An observation becomes accepted as a law after several years of experiments. It has to prove itself to be universal which means it can be accepted as such in any part of the <em>world at any point of time.
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A theory is just the <em>best possible explanation of a fact </em>and it can be replaced when a better explanation comes in its place. Thus there is no surety about the<em> longevity of a theory. </em>
Probability is just a<em> chance of an observation</em> and thus it is not universal. A hypothesis also cannot be considered universal because it is also just an explanation usually <em>proposed with not many evidences.
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