The lightest body weighed goat is

The correct option is Toggenburg.

To understand why Toggenburg is the lightest breed among the options provided, we can look at the average body weights of mature females (does) and males (bucks) for each of these goat breeds:
1. Beetal: A large-sized breed originating from Punjab (India/Pakistan). Mature bucks weigh around 50 to 60 kg, and mature does weigh about 35 to 40 kg.
2. Jamnapari: One of the largest dairy goat breeds, originating from India. Mature bucks can weigh up to 65 to 80 kg, and does weigh about 45 to 60 kg.
3. Barbari: A medium-sized breed originating from East Africa and popular in India. Mature bucks weigh about 35 to 45 kg, and does weigh about 25 to 35 kg.
4. Toggenburg: A Swiss dairy goat breed. While it is a productive milker, it is relatively small compared to large meat and dual-purpose breeds like Jamnapari and Beetal, and its average weight for does is typically around 25 to 30 kg, making it the lightest body weighed goat breed among the choices listed.