48th international kolkata book fair, bangladeshi group threat to suvendu adhikari, bengal bjp leader suvendu adhikari, kolkata, kolkata book fair, peerless hospital, ravindra pai, security of suvendu adhikari, sma disease, sma medicine, spinal muscular atrophy, suvendu adhikari security, suvendu adhikari security increased, threat to suvendu adhikari, vhp, vhp stall denied kolkata book fair, vishva hindu parishad, west bengal, sma, suvendu adhikari