Answer:
The correct answer will be option B.
Step-by-step explanation:
Mitochondria are the double-membrane organelles present in eukaryotic cells which helps in generation of the energy currency that is ATP of a cell.
Mitochondria provide a site for the generation of these ATP molecules, the reason they are known as the kitchen of the cell. Their number in a cell depends on the function of the cell as if a cell is involved in function which need more ATP will have more mitochondria and if not will have few mitochondria.
Since a cardiac muscle cell needs more energy to pump blood from one chamber to another and to body, therefore, cells will have more mitochondria and thus, option B is the correct answer.