Question

Iron is _ useful metal​

Answer 1

Answer:

iron is a useful metal

Explanation:

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Answer 2

Answer:

Explanation: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.