Class XI

Major gaseous man-caused pollutant is
  1. carbon dioxide
  2. carbon monoxide
  3. sulphur dioxide
  4. nitrogen oxides
In order to recover fatigue,
  1. lactic acid is taken to muscles
  2. lactic acid produces toxins
  3. lactic acid is converted to galactose
  4. lactic acid is converted to glucose
While training for long distances, it is better to
  1. train at ground
  2. train at low altitudes
  3. eat more proteins
  4. train at high altitudes
To make their own food, green plants take in
  1. organic food substances
  2. raw materials
  3. water
  4. all of these
 Left and right subclavian veins get lymph through
  1. capillaries
  2. endothelium
  3. lumen
  4. lymphatics
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