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For the given compounds, the correct order of increasing pK a value : ( A ) ( B ) ( C ) ( D ) (E)

1. (E) < (D) < (C) < (B) < (A)
2. (D) < (E) < (C) < (B) < (A)
3. (E) < (D) < (B) < (A) < (C)
4. (B) < (D) < ( C ) < ( A ) < (E)

Correct answer: (B) < (D) < ( C ) < ( A ) < (E)

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