Apple India — iphone x/ manufacturing default- display

Address: New Delhi, Delhi, 110092

I am using iphone x 256 gb, 1year, few months, the phone has never been fallen nor ever had a scratch. But suddenly morning their was a thin green vertical line on the display of the phone.
Which is a manufacturing defect from apple.
The phone was purchased approx for 1 lakh and if have a manufacturing defect then then its apple responsibility to change it at anyhow.