We need the compound that is both metallic and ferromagnetic.

So we check the given oxides:

• $CrO_2$
• $VO_2$
• $MnO_2$
• $TiO_2$

Recall important properties of these oxides:

• $CrO_2$: This is a well-known metallic oxide and it is ferromagnetic. It has been used in magnetic recording materials.
• $VO_2$: Shows a metal-insulator transition, but at ordinary conditions it is not the standard ferromagnetic metallic oxide asked here.
• $MnO_2$: Commonly an oxide with insulating/semiconducting character; not ferromagnetic metallic.
• $TiO_2$: A non-metallic oxide, widely known as a semiconductor/insulator; not ferromagnetic.

Option-wise evaluation:

• A: $CrO_2$ $\rightarrow$ metallic and ferromagnetic ✅
• B: $VO_2$ $\rightarrow$ not the required ferromagnetic metallic compound ❌
• C: $MnO_2$ $\rightarrow$ not metallic and ferromagnetic ❌
• D: $TiO_2$ $\rightarrow$ not metallic and ferromagnetic ❌

Final answer:

The compound which is metallic and ferromagnetic is: $\boxed{CrO_2}$ Hence, Option A is correct.