Correct Option: D

zealot (N.) : a person who is extremely enthusiastic about something (religion/politics)
misanthropist (N.) : a person who hates and avoids other people.
philanthropist (N.) : a rich person who helps the poor and those in need.
pedant (N.) : a person who is too concerned with small details/ rules especially when learning/ teaching
pragmatist (N.) : a person who behaves in a practical and sensible way rather than having fixed ideas/theories