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For the given compounds, the correct order of increasing $\mathrm{pK}_{\mathrm{a}}$ value:

• A
  $(\text { E })<\text { (D) }<\text { (C) }<\text { (B) }<\text { (A) }$
• B
  $(\mathrm{D})<(\mathrm{E})<(\mathrm{C})<\text { (B) }<\text { (A) }$
• C
  $(\text { E })<\text { (D) }<\text { (B) }<\text { (A) }<\text { (C) }$
• ✓
  $\text { (B) }<\text { (D) }<\text { (A) }<\text { (C) }<\text { (E) }$