A: The least common multiple of $6$ and $10$ is $30$.  B: Two numbers are relatively prime.  C: The least common multiple is $60$, and the greatest common factor is $2$.  D: The least common multiple is $48$, and the greatest common factor is $4$. 
Two whole numbers have a least common multiple of $60$.  -Each number is less than or equal to $12$.  -The greatest common factor of the two number is $2$.  What are the two numbers? 
Options:
a. $6$ and $10$ 
b. $5$ and $12$ 
c. $10$ and $12$ 
d. $12$ and $16$ 