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Given below are two statements:
Statement I: Average atomic mass of chlorine is fractional.
Statement II: Average atomic mass is calculated by using natural abundances of different isotopes.
In the light of the above statements, choose the most appropriate answer from the options given below:

A
Statement I is correct but Statement II is incorrect.
B
Statement I is incorrect but Statement II is correct.
C
Both Statement I and Statement II are correct.
D
Both Statement I and Statement II are incorrect.
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