What is 4 point Discrete Fourier Transform of signal x(n) = (1, 2, 3, 4)

A

[10, 2j, -2, -2j]

B

[10,-2, -2, -2]

C

[10, -2 + 2j, -2, -2-2j]

D

[10j, -2, -2, -10j]