Which of the following can be true? If an answer is false, state why it is false

Question:

Which of the following can be true? If an answer is false, state why it is false
a. The (indefinite) integral of Fx(x) is fx(x).
b. The (indefinite) integral of fx(x) is Fx(x).
c. The area under the curve of fx(x) between - ∞ and x is Fx(x).
d. The area under the curve of Fx(x) between - ∞ and x is fx(x)-
e. The derivative of Fx(x) is fx(x)-
f. The derivative of fx(x) is Fx(x).