Excess of gas ‘A’ in atmosphere leads to decrease in oxygen carrying capacity of haemoglobin. Gas ‘B’ is the irritant red haze in atmosphere. ‘B’ oxidizes ‘A’ to ‘C’ and itself reduces to ‘D’. Incorrect statement about A, B, C, D is

• A

  A is CO

• B

  B is N₂O₅

• C

  C is CO₂

• D

  D is NO