Which pair shows compounds with the same radical

A radical is a molecule or atom that has at least one unpaired ... Aluminium hydroxide (Al(OH)3 and sodium hydroxide

Explanation:

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.