P-N Junction Diode question from NEET 2017

Answer: (d)

1. Forward bias needs anode (triangle side) at higher potential than cathode (bar side).
2. (a) $-4\text{ V} < -3\text{ V}$, (b) $-2\text{ V} < +2\text{ V}$, (c) $3\text{ V} < 5\text{ V}$: reverse biased.
3. (d) $0\text{ V} > -2\text{ V}$: anode is higher, so forward biased.
4. So the answer is (d).