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The radius of second orbit of He+ is equal to that of first orbit of hydrogen.
The radius of an orbit in hydrogen like species is directly proportional to n and inversely proportional to Z.
a) Both Assertion and Reasoning are true and Reasoning is correct explanation of Assertion
b) Both are correct but Reason is not explanation of Assertion
c) Assertion is correct but Reason is wrong
d) Both Assertion and Reason are incorrect.