The force of cohesion is

The correct option is Maximum in solids.

Detailed Explanation:
1. Definition of Cohesive Force: Cohesive force is the intermolecular force of attraction that exists between molecules of the same substance. It is responsible for keeping the molecules of a substance bound together.
2. Behavior in Different States of Matter:
- Solids: In a solid, molecules are closely packed in a highly ordered arrangement with very small distances between them. Because the distance between molecules is minimal, the intermolecular attractive forces (forces of cohesion) are extremely strong. This strong cohesion gives solids a fixed shape, rigidity, and definite volume.
- Liquids: In a liquid, the intermolecular spacing is larger than in solids. The cohesive forces are moderate, allowing the molecules to flow and slide past one another while still keeping them in a defined volume.
- Gases: In a gas, the molecules are separated by very large distances. The cohesive forces between them are negligible, allowing gas molecules to move freely in all directions and occupy any available space.

Consequently, the force of cohesion is strongest or maximum in solids, weaker in liquids, and minimum or negligible in gases.