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Direction: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice.
Assertion: Generally, the atomic and ionic radii decreases while moving towards right in period.
Reason: The ionisation enthalpy increases while moving towards left in period.
a. Both \( A \) and \( R \) are 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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