Step 1: Concept
Probability $= \frac{\text{Favorable outcomes}}{\text{Total outcomes}}$.
Step 2: Analysis
Total outcomes for two dice $= 6 \times 6 = 36$.
Favorable outcomes for sum 10: $(4,6), (5,5), (6,4)$. There are 3 outcomes.
Step 3: Conclusion
Probability $= 3/36 = 1/12$.
Final Answer: (A)