The official at a high school who maintains students personal and academic records

A. high school registrar

Explanation:

The clerk who maintains students' personal and academic records is called school registrar. A student  is part of an institution ,so there is information about him / her that has to be neatly filed and recorded. This information is basically related with his / her academic story  along with some personal matters that may affect his / her studies. To file and keep a record of these data is part of the clerical aspect of a school and this is carried out by a school registar.