Q.

Assertion (A): The atomic mass of Argon is 40.

Reason (R) :  The atomic mass of Potassium is 39.

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An Intiative by Sri Chaitanya

a

Both A and R  are true and R is the correct explanation of A

b

A is incorrect and R is correct

c

Both A and R  are true and R is not correct explanation of A

d

A is correct and R is incorrect

answer is B.

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Detailed Solution

Both Assertion and Reason are correct but reason is not correct explanation of Assertion.

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