Answer:
The entropy decreases in B. a gas condensing.
Step-by-step explanation:
Entropy refers to phenomenon which measures the spreading of energy in a system. The energy of the system is spreading it has high entropy, whereas if the energy of the system remains concentrated it is said to have decreased entropy.
In case of air escaping from the tire the energy is spreading out that's why the air is moving out of the tire. Thus, it has high entropy. In case of gas condensing which leads to the formation of liquid, the energy of the gaseous particles remains concentrated such that it may lead to the formation of liquid. Thus, this system has decreased entropy.