An alloy could be created from which of the following combinations:I.   metal + different metalII.  non-metal + different non-metalIII. metal + non-metalIV. metal + same metal

An alloy is a mixture of two or more elements, where at least one element is a metal. Therefore, the possible combinations to create an alloy from the options provided are:

I. Metal + different metal: This is the most common way to create an alloy. For example, bronze is an alloy of copper and tin.

III. Metal + non-metal: Alloys can also be formed with non-metals. For example, steel is an alloy of iron (metal) and carbon (non-metal).

IV. Metal + same metal: This might seem confusing, but technically, it's possible to have an alloy with the same metal if we consider different isotopes of the same metal. For example, 'Rose gold' is an alloy of gold with a small amount of copper.

So, the combinations that can create an alloy are I, III, and IV.