Final answer:
Ammonia (NH₃) option (a) is considered an inorganic compound because it does not contain carbon-hydrogen bonds, unlike the other options which are classified as organic compounds.
Step-by-step explanation:
The question asks which of the following is an inorganic compound: A. Ammonia (NH₃), B. Glucose (C₆H₁₂O₆), C. Vinegar (C₂H₄O₂), D. Butane (C₄H₁₀). Inorganic compounds are generally compounds that do not contain carbon-hydrogen (C-H) bonds, whereas organic compounds usually contain carbon and hydrogen, and are often based on chains or rings of carbon.
Ammonia (NH₃) does not contain any carbon-hydrogen bonds and is thus considered an inorganic compound. On the other hand, glucose, vinegar, and butane contain carbon-hydrogen bonds and are considered organic compounds.