Explanation: RD (2) - 181; A. Astrologer - Study of the influence of planets and stars (জ্যোতিষী শাস্ত্র); B. Astronomer- One who studies heavenly bodies (জ্যোতির্বিদ); C. Archaeologist - One who is interested in ancient building and relics (পুরাতত্ত্ববিদ); D. Anthropologist- One who studies the evolution of mankind (নৃ - বিজ্ঞানী)