Looking at the Q&A, I have to say that the simplest and best answer is none of those options, so I’ll add it:
F. Tell Xin Yue she’s not interested
You can tell someone you’re not interested and they are not entitled to any further explanation. You don’t need to lie about or reveal your sexuality. You don’t need to explain your relationship status. You don’t need to them who if there is someone you’re interested in. That is all private, intimate information, and none of their business if you don’t want to share it.