Fill in the blank with the correct article in the sentence given below:

Lavanya's father requires _____ X-ray of his chest to be done immediately.

an

The correct answer is Option (2) → an

• The word "X-ray" begins with the consonant "X", but it is pronounced as a vowel sound ("ex-ray").
• Since the article "an" is used before words that start with a vowel sound (not just a vowel letter), the correct choice is:  "an X-ray"

"Lavanya's father requires an X-ray of his chest to be done immediately."