Question 48: To create a Faculty table including (makhoa char (10), tenkhoa char (30), dienthoai char (10)) where makhoa is the primary key use which of the following commands:

A. Create table Khoa (makhoa char (10), tenkhoa char (30), dienthoai char (10))

B. Create table Khoa (makhoa char (10) not null, tenkhoa char (30), dienthoai char (10), constraint Khoachinh foreign key(makhoa)

C. Create table Khoa (makhoa char (10) null primary key, tenkhoa char (30), dienthoai char (10))

D. Create table Khoa (makhoa char (10) not null primary key, tenkhoa char (30), dienthoai char (10))