Bangalore Metro Rail Corporation — unnecessary problem from the bag check in counter

The lady from the bag checking counter of sandal soap factory metro station (Bus stop side) did not allow the cooked food and made me open the bag. When i said that only eating was not allowed and it was allowed to carry the food in the bag, she replied arrogantly and then let me go. Her behavior was so arrogant. How do they not know the rules and create unnecessary problems. I request to let the securities know the actual things which are not allowed and avoid unnecessary problems.