Question

(i)
Laughing increases
(a) muscle flexion
(b) resistance to infection
(C) the circulation of antibodies in the blood stream
(d) All of these​

Answer 1

Answer:

d all of these

Explanation:

f.o.l.l.o.w. m.e.

Answer 2

Increases immune cells and infection-fighting antibodies.

Thus option b) is correct.

Hope its helpful.