Answer: Option 'a' is correct.
Step-by-step explanation:
Since we have given that
0.1 is a rational number because it can be written as
form.
So, we can write it as

so, it can be written as 
Hence, option 'a' is correct.
I'm really debating if it should be B. or C. but then again I'm like I really think that's not even the right answers anyway. Can someone help us out?