Chronic respiratory disorders like $.......$ are caused by pollen grains.

  • A
    Asthma
  • B
    Bronchitis
  • C
    Tuberculosis $(TB)$
  • D
    $A$ and $B$ both

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In which of the following disorders do the alveoli get filled with fluid, leading to severe problems in respiration?

If the level of carboxyhaemoglobin in blood reaches up to......,the functioning of the central nervous system is severely affected,which results in death.

$CO$ (Carbon monoxide) is harmful because:

$A$: Asthma patients must never be exposed to dust. $R$: Allergic response may cause vasoconstriction and death.

The oxygen toxicity is related with

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