Narada sting case 2014: Here's all you need to know

The Narada sting operation case is again in spotlight after the CBI arrested four West Bengal ministers on Monday. The development comes days after the Mamata Banerjee-led TMC returned to power for a third term in a thumping victory against the BJP in the recently held Assembly election. What was Narada sting case and why politics intensified over the matter? To know Watch the video.