Which of the structure is incorrcet?1 :struct aa{ int a; float b;};2 :struct aa{ int a; float b; struct aa var;};3 :struct aa{ int a; float b; struct aa *var;};

Which of the structure is incorrcet?1 :struct aa{ int a; float b

1.	Which of the structure is incorrcet?1 :struct aa{ int a; float b;};2 :struct aa{ int a; float b; struct aa var;};3 :struct aa{ int a; float b; struct aa *var;};
A.	1
B.	2
C.	3
D.	1, 2, 3
Answer» C. 3