Question

Arrange the following micro-organisms in ascending order on the basis of their size:
(A). Parvovirus
(B). Clostridium tetani
(C). Mycoplasma gallisepticum
(D). Balantidium coli
Choose the correct answer from the options given below:

• A. (A), (C), (B), (D).
• B. (B), (A), (C), (D).
• C. (C), (A), (B), (D).
• D. (D), (B), (A), (C).

Hint:

To remember size hierarchies:
\[ \text{Viruses (nm)} < \text{Mycoplasmas (fraction of }\mu\text{m)} < \text{Bacteria (few }\mu\text{m)} < \text{Protozoan parasites (tens of }\mu\text{m)} \] Balantidium is a massive ciliate and is visible even under low magnification.

Answer 1

The Correct Option is A