2011 Science & Technology - IT

Bluetooth uses 2-4 GHz radio frequency band, whereas Wi-Fi can use 2-4 GHz or 5 GHz frequency band
Bluetooth is used for Wireless Local Area Networks (WLAN) only, whereas Wi-Fi is used for Wireless Wide Area Networks (WWAN) only
When information is transmitted between two devices using Blue-tooth technology, the devices have to be in the line of sight of each other, but when Wi-Fi technology is used the devices need not be in the line of sight of each other
The statements (a) and (b) given above are correct in this context

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