Question

whicch one of these subtance has a higher melting point than water flour or salt or sugar or all the above

Answer 1

The correct answer is: [D]: "all of the above" .
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Note:
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Choice [A]: "flour" ; and:
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Choice [B]: "salt" ; and:
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Choice [C]: "sugar" ;
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→ all have a higher melting point than water.
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Since: "Choice [D]: "all of the above" ; is an option;
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→ The correct answer is: Answer choice: [D]: "all of the above" .
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Answer 2

Correct answer would be All of the above