(iv) Measles. Mumps, Diphtheria Polio odd one​

The odd one one is diphtheria

Explanation:

There are very minute living organisms that are able to cause different diseases to human which are found in our environment. These are known are microorganisms. They include:

--> viruses

--> bacteria

--> fungi

These microorganisms are able to establish an INFECTION in its human host when it's able fight and overcome the body defence mechanism of the host.

Diphtheria is the odd one because it's an infection which is caused by BACTERIA organism while other options while includes measles, mumps and polio are caused by VIRUS microorganisms.

BACTERIA are the larger microorganisms with a very simple cell structure where the nucleus is not enclosed within a membrane. While VIRUS are the simplest and smallest microorganisms which do not have a cell structure.

Diphtheria is an infection caused by the bacteria microorganism known as the Corynebacterium diphtheriae. These bacteria are able to produce toxins which is its virulent factor that are poisonous to its host.

Measles is an infection caused by paramyxovirus.

Mumps is an infection caused by mumps virus

Polio is an infection caused by picornavirus.

Therefore, Diphtheria infection is the odd one out.

sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.