Every subordinate should receive orders from and be accountable to only one superior is

The correct answer is: Unity of command.

Unity of command is a management principle that states that each subordinate should receive orders from and be accountable to only one superior. This principle is important because it helps to ensure that there is clarity of authority and responsibility, and that subordinates are not confused about who they should be taking orders from. It also helps to prevent conflict and duplication of effort.

The other options are not correct because:

• Unity of direction is a management principle that states that there should be one plan for the entire organization, and that all activities should be coordinated towards that plan.
• Centralization is a management principle that states that decision-making should be concentrated at the top of the organization.
• Scalar chain is a management principle that states that there should be a clear line of authority and responsibility from the top of the organization to the bottom.