Every child, when he/she get admission in Grade 1, would be issued a unique that will continue to remain with the student child throughout his or her academic career_________?

A. Roll no.
B. Registration no.
C. ID
D. Education no.

The correct answer to the question: "Every child, when he/she get admission in Grade 1, would be issued a unique ______that will continue to remain with the student child throughout his or her academic career_______________?" is "ID".