A syrup is a type of solution that primarily consists of:

A syrup is a type of solution that primarily consists of sugars dissolved in water. This sugary solution is designed to mask the taste of medicinal ingredients, making it more palatable, especially for children or those who have difficulty swallowing pills. The sugar content not only enhances flavor but also acts as a preservative, helping to increase the syrup's shelf life.

In this context, other options do not accurately describe the composition of syrup. Oil and water do not mix well, leading to separation, and thus do not form a syrup. Alcohol and solids are relevant for other pharmaceutical applications, like tinctures or extracts, but do not represent the typical composition of syrup. Finally, the idea of active medication and a paste suggests a thicker formulation that is not characteristic of what is commonly recognized as syrup.