Following figure shows an ac generator connected to a "block box" through a pair of terminals. The box contains possible R, L, C or their combination, whose elements and arrangements are not known to us. Measurements outside the box reveals that 

e = 75 sin (sin $\mathrm{\omega }$ t) volt, i = 1.5 sin ($\mathrm{\omega }$ t + 45^o) amp then, the wrong statement is 

• A

  There must be a capacitor in the box 

• B

  There must be an inductor in the box

• C

  There must be a resistance in the box

• D

  The power factor is 0.707