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The dissociation constants of monobasic acids A,B,C and D are 6 × 10⁻⁴, 5 × 10⁻⁵, 3.6 × 10⁻⁶, and 7 × 10⁻¹⁰ respectively. The pH values of their 0.1 molar aqueous solutions are in the order –

A > B > C > D

A = B = C = D

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