Which of the following is a type of intra-gastric balloon?

Intra-gastric balloons are devices that are placed in the stomach to assist with weight loss by creating a feeling of fullness, thereby helping patients reduce food intake. Obalon is indeed a type of intra-gastric balloon. It is a swallowable balloon system that helps patients by occupying space in the stomach, which can lead to reduced hunger and improved weight loss outcomes.

The other options listed—gastric bypass, laparoscopic sleeve, and vertical banded gastroplasty—are all surgical weight loss procedures that involve altering the structure of the gastrointestinal tract in various ways to promote weight loss. These procedures typically involve more invasive interventions than an intra-gastric balloon. Thus, Obalon stands out as the sole intra-gastric balloon option in the list provided.