Final answer:
The strong base that can deprotonate CH3CH2CH2C≡CH is sodium hydroxide (NaOH).
Step-by-step explanation:
In order to determine which of the given bases are strong enough to deprotonate CH3CH2CH2C≡CH, we need to examine the strength of each base. Strong bases are hydroxides of alkali metals (LiOH, NaOH, KOH, RbOH, and CsOH), and hydroxides of heavy alkaline earth metals (Ca(OH)2, Sr(OH)2, and Ba(OH)2).
Among the given options, the only strong enough base to deprotonate CH3CH2CH2C≡CH is sodium hydroxide (NaOH).