One of the great things about working in the nursing field is that there are few limits to the number of specialties you can explore. Also, obtaining a higher degree in a healthcare specialty allows many nurses to pursue their dreams of higher education without sacrificing their love for their chosen field.
The interviewer may ask this for more than one reason. Some employers offer incentives for employees who qualify to go back to school. Other employers like to know what your educational goals are. This way, they can place you in a position of mutual benefit, allowing you to pursue your most meaningful career goals. It is important to remember that there is no right or wrong answer to this question. If you desire to remain an LPN and gain knowledge related to being a Licensed Practical Nurse, that is more than okay!