Which of the following slats has anti-ice capability?

The correct answer indicates that three outboard slats have anti-ice capability. This feature is crucial for ensuring that the leading edges of the wings remain free from ice buildup during flight, especially in cold and moist conditions.

On modern aircraft like the A320, slats are designed to enhance aerodynamic performance by increasing lift and improving stall characteristics at lower speeds. However, in certain weather conditions, especially with a risk of icing, it is vital that these components function effectively and do not freeze, as ice can disrupt airflow and negatively impact the aircraft's performance.

The anti-ice system for the outboard slats typically involves heating elements that activate when the aircraft encounters conditions conducive to icing. By focusing on the three outboard slats, the design ensures adequate protection where it is most needed, as these slats play a significant role in maintaining lift during critical phases of flight.

The other answers do not reflect the design and functionality of the anti-ice system in the A320. It's key to remember that not all slats are equipped with anti-ice capabilities; only certain ones are specifically designed for this purpose.