(A) : Modern periodic table is called Bohr's periodic table.
(R) : Modern periodic table is the graphical representation of Aufbau priniciple.

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(A) is true but (R) is false

(A) is false but (R) is true

Both (A) and (R) are true and (R) is the proper explanation of (A)

Both (A) and (R) are true but (R) is not the proper explanation of (A)

answer is B.

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Detailed Solution

The modern periodic table was prepared by Neils Bohr. So It is also known as Bohr's periodic table.
Modern periodic table indicates the filling of electrons in different sub energy levels like s, p, d, f, where the electron enters into the minimum energy level first, which is called aufbau principle.

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