What is the intended range for a Class 1 Bluetooth transceiver?

What is the intended range for a Class 1 Bluetooth transceiver?

• 33 meters
• 100 meters
• 500 meters
• 10 meters 

EXPLANATION

  Range of Bluetooth is dependant on its class and primarily there are three classes of Bluetooth:

•     Class 1 transmitting at 100 mW with a range of 100 meters or 328 feet.
•     Class 2 transmiting at 2.5 mW with a range of 10 meters or 33 feet (most Bluetooth headsets and headphones are common Class 2 devices).
•     Class 3 transmitting at 1 mW with a range of fewer than 10 meters.