Mumbai (Maharashtra) [India], February 12: The National Stock Exchange (NSE) has approved the Draft Red Herring Prospectus of B D Security Limited for its IPO. The company is going public through an IPO to meet its working capital requirements and for general corporate purposes. The company has plan to issue fresh Issue up to 44,56,000 equity shares, each with a face value of Rs 10, in the forthcoming IPO.