Which of the following is NOT correctly matched?

1. A

   Desalination – seawater

   Desalination of seawater is a correct pairing (thermal distillation or reverse osmosis). It is not the mismatch.

2. B

   Reverse osmosis – potable water

   Reverse osmosis is widely used to produce potable water from brackish or sea water. The pair is correct.

3. C

   Denaturation – proteins

   Denaturation is the unfolding of proteins (heat, pH, urea). The pair is correctly matched.

4. D

   Pasteurisation – tea

   Pasteurisation is heat treatment of milk (and some juices/wine) to kill pathogens, not a process applied to tea as the defining pair. That mismatch makes (d) the official key.

Summary. Official key is (d). Pasteurisation belongs to milk (Louis Pasteur), not tea. Desalination–seawater, RO–drinking water, and denaturation–proteins are correctly matched.