Once you attempt the question then PrepInsta explanation will be displayed.

Price that Sam paid for the car= Rs 1,00,000

Amount saved= Rs 15,000

Now we can say that the Marked price of the car might have been =

1,00,000+25,000= 1,25,000

Now let the % of saving be X=

15,000=X% of marked price= 25,000= 1,25,000X/100= 20%

Hence the correct option is A