The correct option is B Astrology
Astrology is the branch of science that deals with the effects of planets on a person's future, his/her characteristics, time of marriage, etc. This field was divided into tantra, samhita, and hora by Varahamihir. Chemistry is an experimental science that deals with study of matter and how substances interact with energy whereas astronomy is a natural science that studies celestial objects and related phenomena. Metallurgy is concerned with study of metal and its properties.