Class IX

Elements of carbon (C), hydrogen (H2) and oxygen (O2) are present in
  1. fats
  2. carbohydrates
  3. vitamins
  4. both A and B
Intermediate neurons are found within the
  1. Central Nervous System (CNS)
  2. Peripheral Nervous System (PNS)
  3. Superior Nervous System (SNS)
  4. Inferior Nervous System (INS)
Pulmonary circulation links
  1. blood from pulmonary arteries to pulmonary veins
  2. blood from pulmonary veins to pulmonary arteries
  3. blood from lungs to heart
  4. blood in closed circulation system
Total cell count of human body is
  1. 60, 000 billion cells
  2. 6000 billion cells
  3. 600, 000 billion cells
  4. varies with age
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