Match List I (Naturally occurring substances) with List II (Elements) and select the correct answer using the codes given below the Lists: List I - List II 1. I. Diamond - A) Calcium 2. II. Marble - B) Silicon 3. III. Sand - C) Aluminium 4. IV. Ruby - D) Carbon

This is a matching question requiring knowledge of common substances and their constituent elements. 1. Diamond is a crystalline allotrope of Carbon (D). So, I matches D. 2. Marble is a metamorphic rock composed primarily of calcite, which is calcium carbonate (CaCO3). Thus, it contains Calcium (A). So, II matches A. 3. Sand is primarily composed of silicon dioxide (SiO2). Thus, it contains Silicon (B). So, III matches B. 4. Ruby is a gemstone variety of the mineral corundum (aluminium oxide, Al2O3), coloured red by chromium impurities. Thus, it primarily contains Aluminium (C). So, IV matches C. 5. The correct matching sequence is I-D, II-A, III-B, IV-C.