MCQ
In given diagram of kidney A, B and C represents:


- AA-Calyx, B-Medullary pyramid,C-Renal column
- BAll are incorrect
- CA-Renal pelvis, B-Renal pyramid, C-Renal column
- DA-Calyx, B-Renal column, C-Cortex

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$I.$ Relaxation of the diaphragm and sternum
$II.$ Reduction of the pulmonary volume
$III.$ Expulsion of air from the lungs
$IV.$ Increase in intra pulmonary pressure
Choose the correct option