(a) The conditions essential for being free of diseases
(i) Taking good food (balanced diet)
(ii) Maintaining personal and public hygiene.
(b) The answers are not same all the time. Because the meaning of health varies from person to person. For example, good health for a dancer may be being able to stretch his body into difficult but graceful positions. On the other hand, good health for a musician may mean having enough breathing capacity in his/her lungs to control his/her voice. There is one similarity in both the cases. If the conditions essential for good health are maintained, then there are no chances of getting a disease.