Hello, well I’m rather new to this but I have a very confusing question that I just had on a CPC practice exam today and I thought I had the correct answer but apparently it was marked incorrectly. Anyways I’ve been reviewing my answer and the answer that was the correct one and it still doesn’t make sense to me, I still think that I marked the correct answer. Okay well here’s the question and I hope someone can be of help to me and help me understand what I did wrong.

Q. A patient with hypertensive heart disease is now experiencing accelerated hypertension due to papillary muscle dysfunction. What icd-10-cm code(s) is/are reported?

My answer to this was I11.9 hypertensive heart disease without heart failure, and I51.89 other ill-defined heart diseases

Now given the choices of
a. I11.9
b. I11.9, I51.89
c. I10, I11.9
d. I10, I51.89

I went with the one that seemed more logical to me. I really hope someone can help me with this, thank you in advance.