What can be the two odd prime numbers that are added to give the number 18?

It is given that the sum of two odd prime numbers is 18.
We know that if a number is not divisible by 2 then that number is an odd number and the number that is divisible by itself and 1 is called a prime number. 
1. 10, 8 (Both are not odd prime numbers.) 

2. 13, 6 (13 is an odd prime number, but 6 is not a prime number.) 

3. 11, 7 (Both are odd prime numbers. Let's check if they add up to 18.) 

$11+7=18$ - This is correct.

4. 14, 4 (14 is not an odd number, and 4 is not a prime number.)

Therefore, the correct answer is 11 and 7, as they are both odd prime numbers and their sum is 18.