Matching Igneous Textures and Definitions

The question requires matching specific igneous textures listed in Group I with their definitions in Group II.

Texture-Definition Matches

• P - Vitrophyre: This texture is characterized by large phenocrysts dispersed within a fine-grained or glassy matrix. This matches definition 4: "Large phenocrysts within a glassy matrix".
• Q - Rapakivi: This specific texture involves alkali feldspar crystals typically mantled by a later rim of plagioclase. This corresponds to definition 1: "Alkali feldspar rimmed by plagioclase".
• R - Ocelli: Ocelli (singular: ocellus) are typically small, rounded, or irregular masses, sometimes described as eye-like. Definition 2, "Aggregate of radially arrayed, needle-like crystals of plagioclase with or without clinopyroxene", best describes a possible form or component related to ocelli formation in certain contexts, especially when considering the available options.
• S - Spinifex: This texture is distinctive, composed of long, skeletal, needle-like crystals, often olivine or pyroxene, arranged in a felted or sub-parallel manner. This matches definition 3: "Sub-parallel skeletal, platy olivine and/or pyroxene".

Correct Pairing

Based on the analysis:

• P matches with 4
• Q matches with 1
• R matches with 2
• S matches with 3

Therefore, the correct option is P-4; Q-1; R-2; S-3.