Physics - Semiconductors Question with Solution | TestHub

Since, an LED is forward biased diode, so its characteristics are those of forward bias, i.e.,

Here, option (a) is characteristics of a diode in forward and reverse bias. Option (c)$\to$characteristics of solar cell.
Option (d)$\to$reverse bias characteristics 1 drawn in first quadrant can be photodiode or Zener diode.