Metabolic reaction take place
A
In isolated cell free system
Correct option is C. Both $$(A)$$ and $$(B)$$
The sum total of all the chemical reactions occurring in the body is metabolism. Metabolism reactions can be demonstrated outside the body in a cell-free system. Metabolism is involved in catabolism and anabolism. Metabolism takes place in the living system too.
So the correct option is "Both A & B".