Daily Current Affairs Quiz: February 05, 2026

Option [A] is incorrect: Dendritic pattern resembles tree branches and develops on homogeneous rock with gentle slope, where streams join irregularly — not radiate outward from a central elevated feature.

Option [B] is incorrect: Trellis pattern forms in folded or alternating hard–soft rock regions, producing parallel main streams with short right-angle tributaries, typical of ridge–valley topography.

Option [C] is correct: Radial drainage develops when streams flow outward from a central high point such as volcanic cones or domal uplands, moving away in all directions due to uniform slope.

Option [D] is incorrect: Rectangular pattern arises in areas of jointed or faulted bedrock, where streams follow fractures and bend sharply at right angles, not radiating from a central peak.

Option [A] is incorrect: Horizontal plate movement occurs along transform boundaries like strike-slip faults, where crust is neither created nor destroyed, unlike subduction which involves vertical sinking.

Option [B] is incorrect: Upward magma movement causes volcanism, but this is a consequence of subduction or divergence — not the defining mechanism of subduction itself.

Option [C] is incorrect: Separation of plates forms mid-oceanic ridges at divergent boundaries, involving creation of new crust, whereas subduction occurs at convergent margins.

Option [D] is correct: Subduction refers to the sinking of a denser tectonic plate beneath a lighter plate into the mantle at convergent boundaries, leading to deep-sea trenches, earthquakes, and volcanic arcs.

Option [A] is incorrect: Short-duration intense rainfall with thunderstorms is linked to cumulonimbus clouds, which are vertically developed convective clouds, not layered nimbostratus formations.

Option [B] is correct: Nimbostratus clouds are thick, widespread layered clouds that produce continuous, steady rain or snowfall over large areas, typically associated with frontal systems and prolonged overcast conditions.

Option [C] is incorrect: Clear skies and high atmospheric stability are characteristic of high-pressure systems and stratiform fair-weather clouds, not precipitation-bearing nimbostratus clouds.

Option [D] is incorrect: Hailstorms and tornadoes originate from cumulonimbus clouds due to strong vertical air currents, whereas nimbostratus lack intense convection and severe weather dynamics.

Statement 1 is incorrect: Most weather phenomena occur in the troposphere due to active convection and high moisture content; the stratosphere is comparatively stable and lacks vertical air movement needed for weather formation.

Statement 2 is correct: Temperature increases with height in the stratosphere because ozone absorbs incoming ultraviolet radiation, creating a temperature inversion that distinguishes this layer from the troposphere.

Statement 1 is correct: Continental crust floats higher than oceanic crust because it is less dense and thicker, allowing greater buoyancy over the mantle under isostatic equilibrium principles.

Statement 2 is incorrect: Isostatic adjustment does occur after removal of large ice sheets or massive erosion, as the crust rebounds upward (isostatic uplift) to re-establish gravitational balance.