Explanation:

Let’s break it down:

- Ginning: This has nothing to do with steel. Ginning is the process of separating cotton fibers from seeds. It belongs to the textiles industry, not metallurgy.

- Blast furnace: Now, this is at the heart of steel production. Here, iron ore is heated with coke and limestone to make molten iron.

- Pig iron: What comes out of the blast furnace is called pig iron—an intermediate product, crucial for making steel.

- Shaping metal: Once steel is made, it gets shaped—rolled, cast, or formed—into products we actually use.

*So, option 1—Ginning—is not part of steel manufacturing.*