Answer:
(b) -13 degrees Celsius
Explanation:
Temperature inversion is simply the change in temperature with height or altitude.
It is a common phenomenon in the troposphere as we know that the higher one ascends, the cooler/colder it becomes.
Typically, there is a 6°C drop in temperature per km;
6°C drop in 1km
for 4km, there would be a temperature drop of about 24°C;
The temperature at 4km will be 13-24 = -11°C
The closest value to this from the given options is -13°C