In which of the following sentences has an adjective (Visheshan) NOT been used?

In sentence B 'वह विद्यार्थी है' (He is a student), 'वह' is a simple pronoun acting as a subject, and 'विद्यार्थी' is a noun acting as a predicate. No qualifying adjective is present. In contrast: A has 'परिश्रमी' (adjective), C has 'वह' acting as a Sarvanamik Visheshan before the noun 'लड़का', and D has 'प्रबुद्ध' (adjective).