Exercise $3$

$***$ The following relation is in

a$)$ UNF

b$)1NF$

c$)2NF$

d$)3NF$

$\backslash$table$[[$StudentID$,$Name,DepartmentID,Department$],[0001,$Kate Smith,D$1,$Computer Science$],[0002,$Jane Wright,D$3,$History$],[0003,$Robert Miller,D$6,$Chemistry$]]$

Why is this a $2$NF table? StudentID define name, and departmentID define department, isn't this partial dependency? shouldnt it be $1$NF$?$ Please explain