Which SQL command cannot be used to create the Student relation below?

Student Relation

Student$\_$ID Student$\_$Name Dept$\_$Name

$0000$ AAAAA Computer Science

$1111$ BBBBB Computer Science

$2222$ CCCCC Business Administration

Select one:

a$.$

CREATE TABLE Student$($

Student$\_$ID int,

Student$\_$Name char$(100),$

Dept$\_$Name char$(100),$

$)$;

b$.$

CREATE TABLE Student$($

Student$\_$ID int,

Student$\_$Name varchar$(100),$

Dept$\_$Name varchar$(100),$

$)$;

c$.$

CREATE TABLE Student$($

Student$\_$ID char$(20),$

Student$\_$Name char$(100),$

Dept$\_$Name char$(100),$

$)$;

d$.$

CREATE TABLE Student$($

Student$\_$ID int,

Student$\_$Name char$(20),$

Dept$\_$Name char$(20),$

$)$;