After Assam and Bihar, it was Mumbai on Tuesday. The Railway Recruitment Board (RRB) exams made for a Molotov cocktail again as angry Shiv Sena members ransacked the board’s Mumbai Central office and injured three Railway Protection Force (RPF) personnel and one Government Railway Police constable. RRB chairman Anil Mittal and assistant security commissioner (RPF), Rajan Datt, were also injured. The Sena alleged that North Indians were being favoured whereas Maharashtrians ignored. ‘‘This is just a trailer, we will show you (the film) if you continue to hold examinations for outsiders,’’ a Sena member threatened, after his colleagues broke a few computers, chairs, tables and glass at t he station. At Mumbai station, unemployed dream of govt jobs