For what value of K, the number 7236K2 is divisible by 8?

According to the divisibility rule of 8, if any no. is divisible by 8 then the last three digits of that number must be divisible by 8.

Now, 7236K2 is divisible by 8 so, 6K2 must be divisible by 8 with the value of k = 7( According to the options)