Option B is correct because the provided context explicitly lists sandalwood as a main species of Moist deciduous forests. The text states, 'Teak, sal, shisham, hurra, mahua, amla, semul, kusum, and sandalwood etc. are the main species of these forests' in the section describing Moist deciduous forests found in regions with rainfall between 100-200 cm. Hence, it falls under the Deciduous forest category.