Subject :NSO Class : Class 7
Study the given experimental set up. Which of the following statements holds true when the rubber sheet is pulled down?
(i) Air pressure inside the bell jar increases.
(ii) The balloons inside jar expand.
(iii) This is similar to expansion of lungs during inhalation.
(iv) This is similar to contraction of lungs during exhalation.
A (ii), (iii) and (iv) only
B (ii) and (iii) only
C (i) and (iv) only
D (i), (iii) and (iv) only