Answer:
The letter C is the right answer.
Step-by-step explanation:
The Cell Theory was created by Mathias Scheiden and Theodor Schwann and states that all living beings are formed by cells. For this reason, we can say that among the images shown in the above question, the letter C shows an exception to cellular theory. This is because the letter C represents a virus that is a "being" with no cell in its body.
Viruses do not have cells in their constitution, so they are acellular. Viruses are obligate intracellular parasites.
Although they do not have cells and are an exception to cell theory, they rely on living cells to perform their vital activities. This proves that activities essential to life only occur within life cells, as postulated by Cell Theory.