Why does viruses form a exception to cell theory?

Exceptions to cell theory is

An exception to cell theory is

An exception to cell theory is

An exception to cell theory is:

In exception to cell theory is :

In exception to cell theory is :

Is there any exception of cell theory?

Read the following statements and choose the option with all correct statement. I. size of a cell depends upon nucleoplasmic index. II. Occurrence of different type of tissues, organs and organ system results in division of labour. III. 'Omnis cellula-e-cellula' was experimentally demonstrated by Negeli. IV. Viruses are an exception to cell theory.

The …………… are an exception to cell theory.

[A] : Viruses are exception to cell theory . [R] : Viruses don't have a defined nucleus and cytoplasm .