Expiry of weekly options contacts of Nifty and Bank Nifty indices took the bulls to cleaners as both the broader market and the sectoral indices slipped sharply. The main index of the National Stock Exchange, Nifty 50 ended the day with a drop of 1.25 cent or 135.85 point to close at 10,704.80 mark. The Bombay Stock Exchange’s BSE Sensex slipped below the 36,000 mark, before closing at 36,093.47, down 470.41 points or 1.29 per cent on Thursday.