Hello!
The subject of this sentence is "Yo" (I), so we must use the first-person singular conjugation.
Thus, the correct conjugation ends with an "o", or "Pruebo". Choice A is the correct answer.
Igualmente means the feeling is mutual not neutral. To expound a bit more, "igualmente" means "equally." So, if someone says to you, "Good to meet you," you could respond with "Equally," which means, "It's equally good to meet you."