Answer : A chiral carbon atom refers to a bit of carbon connected with four varied atom types. Chiral Carbons could be found by observing four different types of substituents. Hence, any double bond carbons could be eliminated.
This will help to find consecutive three chiral carbons. Examples of chiral carbons would include superimposable molecules. On the other hand, chiral objects examples would consist of hands, feet and others, of which right & left hands are non-superimposable mirror images.
In this view, any glucose will contain four chiral carbons, while the cyclical structure will be five.