In which layer would you find the ozone layer?
a.
mesosphere
b.
troposphere
c.
thermosphere
d.
stratosphere

The correct answer is B. The Troposphere.

The troposphere, hope this helps. 

"the troposphere is the lowest, densest part of the earth's atmosphere in which most weather changes occur and temperature generally decreases rapidly with altitude and which extends from the earth's surface to the bottom of the stratosphere"

According to google the answer is 184800/hr