Explanation:

- Option 1: 14 years

This is a common misconception. Sometimes, people think of 14 years because of certain remission rules, but that isn’t what “life imprisonment” means in the IPC.

- Option 2: 20 years

Not correct under the Indian Penal Code. There's no specific mention of 20 years as a default for life imprisonment.

- Option 3: Whole of natural life

Here’s the thing: Under the IPC, “life imprisonment” means imprisonment for the entire lifetime of the convict, unless remission is lawfully granted. So, unless the government shortens it, it literally means jail for the rest of one’s life.

- Option 4: 10 years

Just not accurate. Ten years can be a term for other offenses, but not for life imprisonment in the context of the IPC.

In summary: life imprisonment under the Indian Penal Code means the convict stays in prison for their entire natural life, not just a set number of years.