Question

It is necessary to keep our bones and muscles strong and healthy. which of the following help us to do so?
(1). regular exercise like running and jogging
(2). Having calcium rich diet
(3). regular exercise and other physical activity
(4).only physical activity

(a).1and2. (b).2and 3
(c).1,2and3. (d).2and4

Answer 1

b is the answer I think so

Answer 2

the answer is (d) 2and4