Select the one that does not belong to that organ system to which the other three belong.
  • a)
    Brain
  • b)
    Spinal cord
  • c)
    Nerves
  • d)
    Lungs
Correct answer is option 'D'. Can you explain this answer?

Related Test

Lungs are part of the respiratory system while brain, spinal cord and nerves are all parts of nervous system.
Lungs are part of the respiratory system while brain, spinal cord and nerves are all parts of nervous system.