Explanation:

Here’s the thing—solitary confinement rules under Section 73 of the Indian Penal Code have clear-cut limits:

- Option 1: Three months

Not correct. Section 73 does not say the max is three months for all cases—there’s more nuance.

- Option 2: Six months

This is the right answer. The absolute maximum for solitary confinement under Section 73 is six months.

- Option 3: One year

Nope. One year exceeds what’s allowed; this option overshoots the mark.

- Option 4: Two years

Definitely out—two years in solitary isn’t permissible.

And just to be super clear: Section 73 says solitary confinement can only be for prisoners sentenced to rigorous imprisonment, and with strict maximums:

- Not more than 14 days at a stretch

- Not more than 3 months in any year (but total allowed over time goes up to six months for long sentences)

So, in a nutshell, six months is the longest anyone can be kept in solitary under this law.