Number of two electron can have the same values of … quantum numbers

In an atom no two electrons can have the same value for all the quantum numbers. This was proposed by:

Assertion : The maximum number of electrons in the shell with principle quantum number n is equal to 2n^(2) . Reason : Two electrons can have the same value of three quantum numbers n, l and m_(l) , but must have the opposite spin quantum number.

Assertion : The maximum number of electrons in the shell with principle quantum number n is equal to 2n^(2) . Reason : Two electrons can have the same value of three quantum numbers n, l and m_(l) , but must have the opposite spin quantum number.

The rule which states that no two electrons can have same value of all the four quantum number is

In a given atom no two electrons can have the same values for all the four quantum numbers. This is called