He should tell his parents without getting scared from them that am not interesting in this subject.a child should take that field only in which he/she is interested.if either i'l take this field also i'll not get good grades in that field. and i'll not be successful in my future. every parent give their child their liberty that take a goo filed but it should have a meaning and should see interest of your in the field that you have choose. then nobody will stop you for becoming a successful child in the future. if you will start your life from here then you will become a successful child. and everyone will praise you and your parents.So, do what you think is right and have interest in that.