The correct option is A They come toward each other.
When we blow into the space between two suspended balloons, the air between the balloons will have a higher velocity compared to the surrounding air. This creates a region of low pressure in the region between the balloons, as per Bernoulli's theorem. The pressure of the air outside the balloons is still constant. The pressure difference results in a force acting on the balloons, making them come closer to each other.