Match List I (Original Rock) with List II (Metamorphic Rock) and select the correct answer using the codes given below the List

List I | List II
I. Slate | (A) Sandstone
II. Quartzite | (B) Dolomite
III. Marble | (C) Granite
IV. Schist | (D) Shale

The correct answer is Option 4 (I-D, II-A, III-B, IV-C). This matching correctly identifies the parent rocks (protoliths) and their corresponding metamorphic derivatives based on geological processes of heat and pressure.

• I-D (Slate - Shale): Slate is a fine-grained, foliated metamorphic rock formed through the low-grade metamorphism of Shale or mudstone.
• II-A (Quartzite - Sandstone): Quartzite is a hard, non-foliated metamorphic rock which was originally pure Sandstone. The quartz grains recrystallize under intense heat and pressure.
• III-B (Marble - Dolomite): Marble forms when sedimentary carbonate rocks, such as Dolomite or Limestone, undergo regional or contact metamorphism, resulting in a crystalline texture.
• IV-C (Schist - Granite): Schist is a medium-grade metamorphic rock. While it often forms from shale, it can also result from the metamorphism of igneous rocks like Granite (often termed orthoschist) under high-pressure conditions.

Options 1, 2, and 3 are incorrect as they misalign these fundamental geological transformations, such as incorrectly pairing Sandstone with Marble or Granite with Slate.