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a
An electronic wave function must be symmetrical with respect to the interchange of any two electrons
b
ψ2 must remain unchanged when the spin and space coordinates of the paired electrons are interchanged
c
For an n electron system the wave function ψ will be a function of 3n spatial coordinate
d
Anti symmetrical wave function are found to represent the properties of electron.
answer is A.
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Detailed Solution
Pauli's exclusion principle states that ψ2 must remain unchanged of spin and space coordinate and that is possible only if ψ changes its sign (anti symmetrical).