Which of these JavaScript variable names represents a different variable from the others?

Select one:

a. somename

b. all of these represent different variables

c. SomeName

d. SOMENAME

e. someName

Which of these refers to the fourth element of a JavaScript array named arrayName?

Select one:

a. arrayName[4]

b. arrayName[2]

c. arrayName(4)

d. arrayName(3)

e. arrayName[3]

Which of these is a valid JavaScript end-of-line comment?

Select one:

a. # Some comment text

b. all of these

c. /* Some comment text

d. // Some comment text

e.