The forward biased diode connection is:

Option A: The p-side (+2V) is at a higher potential than the n-side (-2V), resulting in a forward-biased connection.

Option B: Both terminals are at -3V, so there is no potential difference and the diode is not biased.

Option C: The n-side (4V) is at a higher potential than the p-side (2V), making the diode reverse-biased.

Option D: The n-side (+2V) is at a higher potential than the p-side (-2V), which also results in reverse bias.