Metabolism is
A) Total of all the chemical reactions accuring in the body of organisms
B) Observed even outside the body in a test tube
C) Not observed in non-living objects
A sequence of biochemical reactions occur in the living organisms is called Metabolism. it is the life-sustaining process occurs in the living organism and always takes place in the living organism. Metabolism can be demonstrated out side the living body. They do not occur in the non living body.
So, the correct option is 'ABC'.