Correct option is C
Divisibility rule for 11: (Sum of odd positions) − (Sum of even positions) = multiple of 11.
· Sum of digits in odd places (positions 1 and 3): 1 + y.
· Sum of digits in even places (positions 2 and 4): x + 7.
This difference, (1 + y) - (x + 7) = y - x – 6, must be 0 or ±11 (or another multiple of 11) for divisibility by 11.
The valid scenario that works is y – x – 6 = 0
⇒ y – x = 6
⇒ x – y = −6.
