यह कथन कि 'लड़के बुद्धिमान होते हैं जबकि लड़कियां आज्ञाकारी होती हैं', किसका एक उदाहरण है?

A teacher tells the boys in a co-educational class - 'Do not take up home science in co-curricular activities, you are not a girl'. This would encourage:

A school gives preference to boys while selecting students for a cooking competition and to girls for a badminton competition. This practice indicates: