I know for sure the ganga and brahmaputra rivers do make up the northern plains, not sure about the yamuna. but since two do, then i would answer all of these
One of the country's norms when it comes to the limitations of the activities of women in the society is limited participation in available employment. This means that they can only work on jobs that are for women and these jobs just require them to work with other women only. Answer for this would be option D.
