Examine the five words and/or phrases and determine the relationship among the majority of words/phrases. Choose the one option that does not fit the pattern.

A) Desalination

B) Solar distillation

C) Pycnocline

D) Electrolysis

E) Reverse osmosis

C.

Explanation:

Pycnocline is a layer in the oceanic body in which the density of water increases with the depth in the ocean. This change in density happens due to the changes in temperature and salinity of water.

Other four words/phrases are related to the process of water purification. The only word which does not fit in the water purification process is Pychnocline.

So, the correct answer is Option C.