Answer: The correct answer is -
B) Carbon and nitrogen.
Explanation:
Fungi obtain their food by secreting digestive enzymes, which act upon the complex organic matter (such as starch and proteins) and break them down into simple molecules ( simple nutrients like carbon and nitrogen obtained from digestion of starch and proteins respectively).
The simple molecules like carbon and nitrogen are then absorbed with the help of hyphae (present in their mycelium).
Thus, option B) is the right answer.
