Option D: Hydrochloric acid and sulphuric acid.
Acids produce H⁺(aq) ions in solution, which carry electric current and make the bulb glow. Glucose and alcohol do not ionise, so they do not conduct electricity.
Source: Chapter 2, Section 2.2 (Activity 2.8)
The key concept is ionic conduction: only solutions containing ions can conduct electricity. HCl and H₂SO₄ are strong acids that fully dissociate into ions in water. Glucose and alcohol contain hydrogen but do not produce H⁺ ions in solution, so they are non-electrolytes. Examiners expect you to link "glowing bulb = ions present = acid/base" directly.