Question

which article is used in iron is........ useful metal

Answer 1

The article that is used in iron is........ useful metal.

It is "a".

There are atricles- definite and indefinite.

Definite article includes the and indefinite includes a and an.

The word "a" is used before the consonants and "an" with vowels.

But there are some exceptions to this rule.

As in this case, hence A is use and not an.

Answer 2

Answer:

Mineral

Explanation:

Iron is a mineral.