The correct options are
A <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->
They talked about medicine
B <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->
They talked about how humans can lead a balanced life
D <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->
They talked about how humans can lead a healthy life
These ancient Indian books on medicine laid the foundation of Ayurveda the traditional Indian system of medicine and health. They taught people not only on the medicines they should take during illness but also on how to lead a balanced and healthy life.