Please explain!!

Question 9 Which of the following does NOT define the C-string containing "Hello"? a, char stringvar [10] b. char stringvar [10] c. char stringvar [10] d, char stringvar[6] e. None of the above "Hello"; = = { 'H, , 'e' , 'e, , ' I , , 1 , , 1 , , 1', 'o' } ; 'o,' '10,) riwe {'H,, "Hello