Matteo wanted a new car, he saved his money for six months.
<u>Explanation:</u>
Comma splice is a way of linking to independent sentences using a comma instead of using any other connectors like semicolon etc.
In given options the first one doesn't contain any comma, similarly the third option also doesn't contain any comma and the last one contain so as the connector so we don't require a comma hence second option is the correct answer.
