What is the only state postal abbreviation with two vowels?

Here is the question :

WHAT IS THE ONLY STATE POSTAL ABBREVIATION WITH TWO VOWELS?

Here is the option for the question :

• Oklahoma
• Iowa
• Ohio
• Indiana

The Answer:

And, the answer for the the question is :

Explanation:

[STC001535] Do you mentally search for postal codes? You would assume that with 50 states in the US, at least some of them would have a postal abbreviation with two vowels. However, only Iowa, whose name is abbreviated “IA,” has that distinction. The usual initial two letters of the state name (‘IO’) were not used for the postal code since they could be mistaken for the numbers one and zero. Instead, ‘IA’ was chosen. The initial two letters of Iowa are special, though, because they are the only pair of vowels in a state name.