A
brown forest soil
B
fissure volcanic rock
C
granite and schist
D
shale and limestone
Correct answer: (b) fissure volcanic rock
Explanation
- A
brown forest soil
Brown forest soil. A temperate forest type, not Deccan clay.
- B
fissure volcanic rock
Fissure volcanic rock. Deccan Trap basalt weathers to black cotton / regur.
- C
granite and schist
Granite and schist. Red/yellow soils more often.
- D
shale and limestone
Shale and limestone. Different parent.
Summary. Official key is (b) fissure volcanic rock. Black cotton soil (regur) is weathered Deccan Trap basalt from fissure eruptions.