Can u consider a person who holds a bachelors degree in law for a job in marketing?

Any Proffessional Degree is not a criteria for selling or marketing a product. Basically it is a born skill related to the  instinct of the person. A proffessional training can only guide or mold these skills to a more advanced level. A right way of communication and understanding is the most important quality of a sales/marketing personal, than any accademic qualification..

Yes, if I had a person's ability to persuade and deliver information in a simple way

Can someone holds the rights to be seen in a job in the field of marketing, because marketing by the fact that the study is acquired to an end with some courses and passion for marketing can be a breakthrough in the world of marketing

Yes dear ,if the said person have a professional capibility for driven my products in the market,better then to the marketing degree holders.