(A) : Al is highly electro positive metal in IIIA group.
(R) : ‘Al’ has lowest negative S.R.P in IIIA group.

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(A) is true but (R) is false

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

Both (A) and (R) are false

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

answer is C.

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Detailed Solution

Electronegativity order : B > Tl > In > Ga > Al

Electropositivity order : B < Tl < In < Ga < Al

Electropositivity order ∝ Metallic nature

Reduction potential : Reduction potential is a measure of tendency to gain of electrons.

More the positive reduction potential means more easy of gaining of electrons and more the electronegativity of that element [non metal].

But "Al" is metal and hence it has high oxidation potential value and has low reduction potential value, means it has highest negative value.

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