Explanation:

1st option is correct.
Mitochondria is the Powerhouse of the Cell is an expression describing the function of mitochondria organelles found in the cells of eukaryote organisms.
The mitochondrion (plural mitochondria) is a double membrane-bound organelle found in all eukaryotic organisms. Some cells in some multicellular organisms may however lack them (for example, mature mammalian red blood cells).