sudo yum repolist show repo not in /etc/yum.repo.d

I'm having a little issue with yum. I'm trying to install a package but i realised yum it’s pulling it from the wrong repo (let’s call it repoB) (I have added my own repo(let’s call it repoA) in the yum.repo.d folder) when I look inside the yum.repo.d I do not see that repoB…? But when I run sudo yum repolist I can see that repoB listed. My question is, where is located this repoB ? How can I remove it ? Thanks!