Step 1: Identifying Coaliferous Units.
The Barakar Formation is recognized for its coal-rich strata, making it the most coaliferous unit within the Gondwana Supergroup. Other formations, such as the Talchir and Karharbari, also contain coal, but the Barakar Formation stands out in terms of coal content.
Step 2: Conclusion.
Therefore, the correct answer is the Barakar Formation.
Final Answer: \boxed{(B)}
| Group-I | Group-II | ||
| P | Ramgundam | 1 | Chhattisgarh |
| Q | Raipur Formation | 2 | Kaladgi |
| R | Bagalkot Group | 3 | Marwar |
| S | Sonia Sandstone | 4 | Godavari |
Match the following basins in Group I with their corresponding formations in Group II. \[ \begin{array}{|c|c|} \textbf{Group I} & \textbf{Group II} \\ P. Cauvery & 1. Lohardih \\ Q. Damodar & 2. Tiratgarh \\ R. Chhattisgarh & 3. Raniganj \\ S. Indravati & 4. Kallamedu \\ \end{array} \]
While doing Bayesian inference, consider estimating the posterior distribution of the model parameter (m), given data (d). Assume that Prior and Likelihood are proportional to Gaussian functions given by \[ {Prior} \propto \exp(-0.5(m - 1)^2) \] \[ {Likelihood} \propto \exp(-0.5(m - 3)^2) \] 
The mean of the posterior distribution is (Answer in integer)
Consider a medium of uniform resistivity with a pair of source and sink electrodes separated by a distance \( L \), as shown in the figure. The fraction of the input current \( (I) \) that flows horizontally \( (I_x) \) across the median plane between depths \( z_1 = \frac{L}{2} \) and \( z_2 = \frac{L\sqrt{3}}{2} \), is given by \( \frac{I_x}{I} = \frac{L}{\pi} \int_{z_1}^{z_2} \frac{dz}{(L^2/4 + z^2)} \). The value of \( \frac{I_x}{I} \) is equal to 
Suppose a mountain at location A is in isostatic equilibrium with a column at location B, which is at sea-level, as shown in the figure. The height of the mountain is 4 km and the thickness of the crust at B is 1 km. Given that the densities of crust and mantle are 2700 kg/m\(^3\) and 3300 kg/m\(^3\), respectively, the thickness of the mountain root (r1) is km. (Answer in integer)