Which of the following is considered a complex carbohydrate?

The correct response is based on the classification of carbohydrates. Complex carbohydrates consist of sugar molecules that are connected together in long, branched chains, making them more complex than simple carbohydrates. Starch is a prime example of a complex carbohydrate; it is composed of many glucose units linked together. This structure means that starch takes longer to digest, providing a slower, steadier release of energy.

In contrast, sugar is categorized as a simple carbohydrate, as it consists of just one or two sugar molecules. Milk, while it contains carbohydrates in the form of lactose, also doesn’t fit the definition of a complex carbohydrate; it is primarily known for its protein and fat content along with some sugars. Additionally, salt is not a carbohydrate at all, but rather a mineral compound made up of sodium and chloride ions.

Thus, starch stands out as the only option that is classified as a complex carbohydrate, distinguishing it from the other choices listed.