Well frankly I did not know and I just tried to verify the data with other sources than Alexa.
On Google Trends - I was searching for Naukri.com. What did I find out? The top city in the entire world which searches for Naukri.com on google is Noida (India).
Is this a coincidence that Naukri is based out of Noida?
But I am still not able to figure out that why they are all searching on Google :)