Solution : Key Idea It is an example of Friedel-Craft reaction. First $$\pi $$ - electrons of cyclohexene attack at $${H^ + }ion$$ of $$HF$$ and form carbocation. This carbocation further reacts with benzene and forms addition product.
Thus, the correct option is (C).
Releted MCQ Question on Organic Chemistry >> Hydrocarbons (Alkane, Alkene and Alkyne)