[A] : Mitochondria are called power houses of the cell.
[R] : Mitochondria produces ATP by the break-down of carbohydrates into carbon dioxide (of carbohydrates) and water .

Options

A. 1)If both A and R are true and R is the correct explanation of A
B. 2)If both A and R are true but R is not the correct explanation of A
C. 3)If A is true and R is false
D. 4)If both A and R are false