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Q 2686880777.    
JEE 1998

Assertion : Nuclide `text()_(13)^(30) Al` is less stable than ` text()_(20)^(40) Ca`.

Reason : Nuclides having odd number of protons and neutrons arc generally unstable.

A Both A and R individually true and R is the correct explanation of A
B Both A and R are individually true but R is not the correct explanation of A
C A is true but R is false
D A is false but R is true

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(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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