Question

4. Pick the odd one out from the following groups and give reasons for doing so

a) Montenegro, Romania, Macedonia, Sweden

b) River Danube, Dnieper, Don Volga.

c) Carbon dioxide, Ozone, Methane, Nitrogen.

d) Hygrometer, Barometer, Anemometer, Thermograph.

e) Carpet making, Food products, Sculpture, Fertilizers.​

Answer 1

Answer:

option c is the right answer