Which of the following words is an adjective (Visheshana)?

In Hindi grammar, 'Nipat' (निपट) can function as an adjective meaning absolute, complete, or pure (e.g., निपट मूर्ख - absolute fool). 'Chupchap' is an adverb (Kriya-visheshana), 'Kharch' is a noun, and 'Matra' is a particle/modifier.