Which one of the following is spread over three States ?

Which of the following geographical/natural regions is declared "World Heritage Site" ?

 Consider the following pairs :

Which of the above pairs are correctly matched ?

Consider the following statements :

1. LED-based lamps do not contain mercury.
2. LED-based lamps cannot be used as street-lights.

Which of the statements given above is/are correct ?

The deflection of planetary wind is caused by the :

Consider the following which can be found in the ambient atmosphere :

1. Soot
2. Sulphur hexafluoride
3. Water vapour

Which of the above contribute to the warming up of the atmosphere ?