Explanation:

- Statement I: Tuberculosis is caused by a bacterium called *Mycobacterium tuberculosis*, not a virus. It spreads through the air when an infected person coughs or sneezes. Therefore, this statement is incorrect.

- Statement II: Chickenpox is caused by the varicella-zoster virus. It spreads mainly through direct contact with the infectious rash or through the air from an infected person’s cough or sneeze, not through water or food. So, this statement is also incorrect.

- Option 3: Neither I nor II correctly describes the disease, microorganism, and their mode of transmission.

- The correct answer is Option 3: Neither I nor II.