Change the position of two digits in the number 527253 so that the number formed will become divisible by 11.

Change the position of two digits in the number 527253 so that the number formed will become divisible by 11.

incorrect?A- 28 is a perfect number

B- The factors of any positive integers are infinite.

C- If a number is divisible by 4 and 15, it will be divisible by 20.

Here, Option - b is ans. But why option c is correct here as per which concept. Plz help

ANS- 12 But how to solve plz help.