C program solve by C program

Which of the following is correct printf statement? Question 4 Not yet answered Marked out of 1.00 Flag question O printf("%d", a); O Printf("%d", &a): O printf("%d", &a): O printf("%d", a): Question 5 function is used to read character, string, numeric data from keyboard. Not yet answered Marked out of 1.00 P Flag question O scanf() OscanFO O Scanfo O SCANFO Question 6 Not yet answered Which of the following is valid variable name? Marked out of 1.00 Flag question O 123value Value 1 O value &Value 1