Question

Match the twinning in Group I with the corresponding mineral in Group II. 
\[\begin{array}{|c|c|} \hline \textbf{Group I} & \textbf{Group II} \\ \text{P. Cross-hatched} & \text{1. Plagioclase} \\ \hline \text{Q. Carlsbad} & \text{2. Microcline} \\ \hline \text{R. Polysynthetic} & \text{3. Sanidine} \\ \hline \text{S. Brazil} & \text{4. Quartz} \\ \hline \end{array}\] 

 

• A. P-4, Q-2, R-1, S-3
• B. P-2, Q-3, R-1, S-4
• C. P-1, Q-2, R-3, S-4
• D. P-4, Q-3, R-2, S-1

Hint:

Familiarize yourself with the types of twinning and their characteristic minerals for better identification.

Answer 1

The Correct Option is B

Step 1: Understanding twinning in minerals.
Twinning is a common crystallographic phenomenon where two or more crystals share a symmetrical relationship. In this case, we need to match the twinning types with the corresponding minerals.

Step 2: Analyzing the options.
P. Cross-hatched: Cross-hatched twinning is characteristic of Plagioclase (1).
Q. Carlsbad: Carlsbad twinning is typical in Microcline (2).
R. Polysynthetic: Polysynthetic twinning is a characteristic of Sanidine (3).
S. Brazil: Brazil twinning is most common in Quartz (4).

Step 3: Conclusion.
The correct answer is (C) P-1, Q-2, R-3, S-4, matching the twinning to the correct minerals.