Why do cattle and goats avoid browsing on Calotropis?

The correct answer is Option (3) -The cardiac glycosides produced by Calotropis

Calotropis is a plant that contains a toxin called cardiac glycosides. These toxins are poisonous to animals, and they can cause heart problems.

Cattle and goats are herbivores, which means that they eat plants. However, they avoid eating Calotropis because it contains cardiac glycosides. If they were to eat Calotropis, they would likely become sick or even die.