Daya Shetty Production*, Teaser & trailer launched of their upcoming suspense-thriller Hindi film *’Hello! Knock Knock Kaun Hai?’* directed by Prabhal Baruah and produced by Dayanand Shetty. starcast of the film *Aditya Shrivastava, Sonali Kulkarni, Barkha Bisht, Zarina Wahab and Lilliput alongside Dayanand Shetty and director Prabhal Baruah*