Question

i bought ___pen which is costly ​

Answer 1

I bought a pen which is costly.

Answer 2

$\large\underline\mathtt\orange{ANSWER⤵}$

✏ A

I bought a pen which is costly.

Hope it helps..

Keep smiling..☺

______❤_______

KNOW MORE :-

An article is something used before the nouns that helps us to state whether it starts from a vowel or constant or is a proper noun or common.

Articles :-

• A
• An
• The