Which of the following sentences correctly uses punctuation to show a quick change between ideas

Answer 1

1. I love ice cream, however, I am lactose intolerant.
2. I love ice cream however I am lactose intolerant.
3. I love ice cream; however, I am lactose intolerant.
4. I love ice cream however, I am lactose intolerant.

The correct sentence is: 3. I love ice cream; however, I am lactose intolerant.