Step 1: Understanding the marine benthic zones.
Marine benthic habitats are categorized by their depth in the ocean. The neritic zone is the shallowest, typically from the shoreline to the continental shelf. The bathyal zone is deeper and extends from the continental shelf to the abyssal plain, which is the deepest part of the ocean.
Step 2: Analyzing the options.
(A) abyssal, bathyal, neritic: This order is incorrect because the neritic zone is the shallowest, not the deepest.
(B) neritic, abyssal, bathyal: This order is incorrect because abyssal comes before bathyal in depth.
(C) neritic, bathyal, abyssal: This is the correct order, with neritic being the shallowest, followed by bathyal and abyssal as the deeper zones.
(D) bathyal, abyssal, neritic: This is incorrect, as the neritic zone is the shallowest.
Step 3: Conclusion.
The correct answer is (C) neritic, bathyal, abyssal because these zones follow the correct depth sequence.
Match the bivalves in Group I with their modes of life in Group II. 
A magma having density of 2900 kg m\(^-3\) just reaches the surface through a two-layered crust as shown in the figure below. Assuming isostatic equilibrium, its depth of melting is .......... km. (Round off to one decimal place) 
Two boreholes A and B, both inclined towards 270°, penetrate a dipping coal bed at the same point and pass through it entirely in the sub-surface as shown in the figure below. The bed dips towards 270°. The thickness of the coal bed, measured along the borehole A is 10 m and along borehole B is 8 m. The angle between the two boreholes is 20°. The orthogonal thickness \( x \) of the coal bed is ........ m. (Round off to one decimal place) 
A well-developed succession of laminated shale is bound by two volcanic ash beds that were precisely dated as shown in the schematic diagram given below. Assuming a constant sedimentation rate, the age of the fossiliferous limestone bed 65 m above the basal volcanic ash bed is ............ Ma. (Round off to nearest integer) 
The data tabulated below are for flooding events in the last 400 years.
The probability of a large flood accompanied by a glacial lake outburst flood (GLOF) in 2025 is ........... \(\times 10^{-3}\). (Round off to one decimal place)
| Year | Flood Size | Magnitude rank |
|---|---|---|
| 1625 | Large | 2 |
| 1658 | Large + GLOF | 1 |
| 1692 | Small | 4 |
| 1704 | Large | 2 |
| 1767 | Large | 2 |
| 1806 | Small | 4 |
| 1872 | Large + GLOF | 1 |
| 1909 | Large | 2 |
| 1932 | Large | 2 |
| 1966 | Medium | 3 |
| 2023 | Large + GLOF | 1 |
A satellite launching vehicle is carrying a lander for Moon mapping.
As shown in the figure below, P is the position where the gravitational forces exerted by Earth and Moon on the vehicle balance out.
The distance \( P \) from the center of the Earth is ........... \(\times 10^5\) km. (Round off to two decimal places)