Introduction:
Artificial Intelligence (AI) refers to the simulation of human intelligence in machines that are programmed to think and learn like humans. It involves the development of computer systems that can perform tasks that would typically require human intelligence. In this context, let's analyze the given options to determine which one is not considered AI.

Humanoid Robots:
- Humanoid robots are machines designed to resemble and perform tasks similar to humans.
- They are equipped with sensors, actuators, and software that allow them to perceive and interact with the environment.
- Humanoid robots can perform various tasks such as walking, talking, recognizing faces, and even engaging in basic conversations.
- These robots are considered a form of AI as they are designed to mimic human behavior and intelligence.

Self-Driving Cars:
- Self-driving cars, also known as autonomous vehicles, are vehicles that can navigate and operate without human intervention.
- They use a combination of sensors, cameras, radar, and AI algorithms to perceive the surroundings, make decisions, and control the vehicle.
- AI plays a crucial role in self-driving cars as it enables them to analyze data from sensors, understand traffic rules, and make real-time decisions while driving.
- Self-driving cars require a high level of AI capabilities to ensure safe and efficient transportation.

An Automated Air Conditioner:
- An automated air conditioner refers to a system that can regulate the temperature and humidity of a room or building without human intervention.
- While air conditioners can be equipped with advanced sensors and programmable features, they do not possess the characteristics of AI.
- Automated air conditioners primarily rely on pre-set instructions and sensors to maintain the desired temperature, rather than learning and adapting based on human-like intelligence.

Conclusion:
Based on the analysis, the correct answer is option 'C' - an automated air conditioner. While humanoid robots and self-driving cars are examples of AI, an automated air conditioner does not possess the same level of intelligence and decision-making capabilities. It relies on pre-programmed instructions and sensors to function, rather than exhibiting human-like thinking and learning abilities.