Sandstone is a
(i) Sedimentary rock
(ii) Aqueous rock
(iii) Siliceous rock

Correct Answer: Option C: Both (i) and (iii)

(i) Sedimentary rock – ✅ Correct
Sandstone is definitely a sedimentary rock.
It forms through the compaction and cementation of sand-sized mineral particles over time, often in layers.

(ii) Aqueous rock – ❌ Not a standard classification
While sandstone forms in environments involving water (like rivers, lakes, or oceans), the term “aqueous rock” is not a formal geological classification.
In geology, rocks are usually grouped as igneous, sedimentary, or metamorphic.
“Aqueous” may be used descriptively, but not as a standalone rock type.

(iii) Siliceous rock – ✅ Correct
Sandstone is primarily composed of quartz, which is silicon dioxide (SiO₂).
This makes sandstone a siliceous rock due to its high silica content.

Final Conclusion:
Sandstone is a sedimentary and siliceous rock, but not formally an aqueous rock.
Therefore, the correct answer is Option C: Both (i) and (iii).