Step 1: Recall the two broad categories of insurance.
Insurance in India is mainly split into Life Insurance and General Insurance.
Step 2: Place the other options correctly.
Marine insurance, fire insurance, and health insurance are all branches that sit under the General Insurance category itself.
Step 3: Identify the odd one out.
Since the question asks what falls outside General Insurance, the answer is Life Insurance, the only category kept separate from it.
\[ \boxed{\text{Life insurance}} \]