With reference to the treatment of cancerous tumours, a tool called cyberknife has been making the news. In this context, which one of the following statements is not correct ?

• 1. Bluetooth device 
• 2. Cordless phone 
• 3. Microwave oven 
• 4. Wi-Fi device 

Consider the following statements :

The satellite Oceansat-2 launched by India helps in

• 1.       estimating the water vapour content in the atmosphere.
• 2.       predicting the onset of monsoons.
• 3.       monitoring the pollution of coastal waters.

Which of the statements given above is/are correct ?