The gold numbers of gelatin,haemoglobin,and sodium acetate are $0.005$,$0.05$,and $0.7$ respectively. Their protective power will be in the order:

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