खालीलपैकी कोणते/ती विधान/ने बरोबर आहे/त ?
A. पाचगणी येथे सापडणारा जांभा दगड हा बॅसॉल्टच्या रासायनिक विदारणापासून तयार झालेला आहे.
B. महाबळेश्वर येथे जांभा दगड आढळतो कारण तेथे 3000 मि.मि. पेक्षा जास्त पाउस पडतो.
C. कोकण किनार पट्टीच्या प्रदेशात आढळणारा जांभा दगड दुय्यम स्वरूपाचा आहे.

The correct answer is Option D (A, B, C).

Key Points:
• Laterite Rock Formation in Maharashtra:
• Statement A is correct: The high-altitude laterite capping at Panchgani and Mahabaleshwar was formed by intense chemical weathering and leaching of Deccan trap basalt under alternate wet and dry tropical conditions.
• Statement B is correct: High rainfall (exceeding 3000 mm to 6000 mm annually) at Mahabaleshwar causes heavy leaching of silica, leaving behind insoluble oxides of iron and aluminium forming laterite.
• Statement C is correct: High-level laterites on the Western Ghat plateaus are primary (in situ), whereas low-level coastal laterites in Konkan (Ratnagiri and Sindhudurg) are predominantly secondary (detrital/transported) forms.
• In the official MPSC Final Answer Key, Option 4 (A, B, C) was selected.
• Key Takeaway: Laterite formed via basalt leaching; Mahabaleshwar has >3000 mm rain, and coastal Konkan possesses secondary laterite (A, B, C are correct).