What are $\mathrm{A}, \mathrm{B}, \mathrm{C}$ in the following reactions? (i) $\left(\mathrm{CH}_{3} \mathrm{CO}_{2}\right)_{2} \mathrm{Ca} \stackrel{\Delta}{\longrightarrow} \mathrm{A}$ (ii) $\mathrm{CH}_{3} \mathrm{CO}_{2} \mathrm{H} \frac{\mathrm{HI}}{\operatorname{Red} \mathrm{P}} \mathrm{B}$ (iii) $2 \mathrm{CH}_{3} \mathrm{CO}_{2} \mathrm{H} \stackrel{\mathrm{P}_{4} \mathrm{O}_{10}}{\longrightarrow} \mathrm{C}$

• A

  $A - \mathrm{C}_{2} \mathrm{H}_{6} \quad B- \mathrm{CH}_{3} \mathrm{COCH}_{3}$ C - $\left(\mathrm{CH}_{3} \mathrm{CO}\right)_{2} \mathrm{O}$
• B

  $A -\left(\mathrm{CH}_{3} \mathrm{CO}\right)_{2} \mathrm{O}\quad B - \mathrm{C}_{2} \mathrm{H}_{6}$ C - $\mathrm{CH}_{3} \mathrm{COCH}_{3}$
• Correct answer
  C

  $A - \mathrm{CH}_{3} \mathrm{COCH}_{3} \quad B- \mathrm{C}_{2} \mathrm{H}_{6}$ C - $\left(\mathrm{CH}_{3} \mathrm{CO}\right)_{2} \mathrm{O}$
• D

  $A - \mathrm{CH}_{3} \mathrm{COCH}_{3}\quad B- \left(\mathrm{CH}_{3} \mathrm{CO}\right)_{2} \mathrm{O}$ C - $\mathrm{C}_{2} \mathrm{H}_{6}$

Hence, the correct answer is option: 'C'.