The correct option is B False
'The' is the only definite article, it modifies a noun which is specific, the identity of the noun is made known. It's not specific which orange is being eaten, just any orange, hence a definite article is not used. 'An' is not a definite article. Since the noun 'orange' is non-specific, an indefinite article 'an' is used. Hence Option A is incorrect and Option B is correct.