The gold numbers of gelatin, haemoglobin and sodium acetate are $5 \times 10^{-3}$, $5 \times 10^{-2}$ and $7 \times 10^{-1}$, respectively. The protective actions will be in the order

• A
  Gelatin $ < $ haemoglobin $ < $ sodium acetate
• B
  Gelatin $>$ haemoglobin $>$ sodium acetate
• C
  Haemoglobin $ < $ gelatin $ < $ sodium acetate
• D
  Sodium acetate $>$ gelatin $>$ haemoglobin