निम्नलिखित अभिक्रियाओं के समूह में मुख्य उत्पाद $A$ और $B$ क्या हैं?

• A
  $A = \text{2-hydroxy-2-methylpropan-1-amine}, B = \text{2-methyl-2-hydroxypropanoic acid}$
• B
  $A = \text{2-hydroxy-2-methylpropan-1-amine}, B = \text{2-hydroxy-2-methylpropanal}$
• C
  $A = \text{2-hydroxy-2-methylpropanal}, B = \text{2-hydroxy-2-methylpropanoic acid}$
• D
  $A = \text{2-hydroxy-2-methylpropan-1-amine}, B = \text{2-methylprop-2-enoic acid}$