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Which statement(s) is/are CORRECT I....

Which statement(s) is/are CORRECT
I. All matters are made of very particles.
II. Atoms of different elements have different masses and chemical properties.
III. The relative number of atoms is variable in any compound.

A

Only I and II

B

Only I and III

C

Only II and III

D

All I, II and III

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The correct Answer is:
A
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