Which of the following is a ferrous alloy ?A Solder B Brass C Magnalium D Steel

To determine which of the options is a ferrous alloy, we need to understand what a ferrous alloy is. Ferrous alloys are alloys that contain iron as the main element.

Looking at the options provided, we can eliminate options A (Solder) and C (Magnalium) as they do not contain iron.

Now, we are left with options B (Brass) and D (Steel). Brass is an alloy made primarily of copper and zinc, so it does not contain iron. On the other hand, steel is an alloy made primarily of iron and carbon, making it a ferrous alloy.

Therefore, the correct answer is D (Steel).