Question

Match List - I with List - II 

List - I (Texture / Structure)	Associated Rock
A. Ophitic	II. Dolerite
B. Trachytoid	I. Syenite
C. Myrmekite	IV. Granite
D. Glomeroporphyritic	III. Basalt

• A. A-II, B-III, C-I, D-IV
• B. A-I, B-IV, C-III, D-II
• C. A-II, B-I, C-IV, D-III
• D. A-I, B-II, C-IV, D-III

Hint:

Ophitic texture is typical of dolerite, and myrmekite texture is commonly associated with granite.

Answer 1

The Correct Option is C

Concept:
Igneous rocks show different textures depending on their cooling history, mineral composition and crystallization pattern.

Step 1: Match Ophitic texture.
Ophitic texture is commonly found in dolerite, where pyroxene encloses plagioclase laths. \[ A\rightarrow II \]

Step 2: Match Trachytoid texture.
Trachytoid texture is commonly associated with syenite due to flow arrangement of tabular feldspar crystals. \[ B\rightarrow I \]

Step 3: Match Myrmekite texture.
Myrmekite is an intergrowth texture commonly seen in granitic rocks. \[ C\rightarrow IV \]

Step 4: Match Glomeroporphyritic texture.
Glomeroporphyritic texture is commonly associated with basalt, where phenocrysts occur in clusters. \[ D\rightarrow III \] Therefore, the correct matching is: \[ A-II,\ B-I,\ C-IV,\ D-III \] \[ \therefore \text{Correct Answer is (C)} \]