Explanation:

Only statements 1&2 are correct.

• Statement 3 is incorrect: Various technologies and sensors that are used include radar (all-weather) and sometimes laser (LIDAR) and cameras (employing image recognition) to detect an imminent crash. While the GPS sensors can detect fixed dangers such as approaching stop signs through a location database.

Advanced emergency braking system (AEBS)

• The World Forum for Harmonization of Vehicle Regulations defines AEBS (also automated emergency braking in some jurisdictions).

• UN ECE Regulation 131 requires a system that can automatically detect a potential forward collision and activate the vehicle braking system to decelerate a vehicle to avoid or mitigate a collision. UN ECE regulation 152 says deceleration can be 5 meters per second squared.

• Once an impending collision is detected, these systems provide a warning to the driver. When the collision becomes imminent, they can take action autonomously without any driver input (by braking or steering or both).

• Collision avoidance by braking is appropriate at low vehicle speeds (e.g. below 50 km/h (31 mph)), while collision avoidance by steering may be more appropriate at higher vehicle speeds if lanes are clear.

• Cars with collision avoidance may also be equipped with adaptive cruise control, using the same forward-looking sensors.

Hence option 2nd is correct.