Kolkata, Nov 27 (ANI): Congress leader Pradip Bhattacharya on Wednesday said that West Bengal CM Mamata Banerjee’s name has been exposed by Kunal Ghosh and therefore this case needs to be properly investigated. A 36-minute video of Rajya Sabha MP and suspended TMC member Kunal Ghosh caused embarrassment to the TMC after Ghosh directly linked chief minister Mamata Banerjee and Trinamool’s national general secretary Mukul Roy with the Saradha chit fund scam that has been rocking the state for the last eight months. The 36-minute video recorded earlier was broadcast on a local Bengali channel on Tuesday.