Step 1: Understanding the Concept:
Settlement or urban form is commonly classified into a small set of standard patterns: Organic (unplanned, irregular streets that grow around a natural feature or old core), Grid Iron (a regular grid of streets crossing at right angles, forming rectangular blocks), Linear (development stretched as a ribbon along a road, river, or coastline), and Radial or Radial-Concentric (ring roads crossed by roads radiating outward from a central point).
Step 2: Key Formula or Approach:
Look at each labelled diagram, identify which standard pattern it draws, and then check each option statement against that identification.
Step 3: Detailed Explanation:
P shows an irregular cluster of built form growing next to the "Agricultural field", with winding, non-uniform streets and no repeating geometry, this is the Organic pattern.
Q shows a clear set of parallel and perpendicular streets crossing each other to form rectangular blocks, this is the Grid Iron pattern.
R shows rows of built form curving to follow the winding bank of a river, a ribbon of development tracing a natural linear feature, this is the Linear pattern.
S shows concentric rings crossed by roads radiating out from a central point, this is the Radial (radial-concentric) pattern.
Now check the four options: (A) "P-Organic, R-Linear" matches both identifications exactly, so it is correct. (B) "P-Organic, Q-Linear" gets P right but wrongly calls Q Linear when Q is Grid Iron, so it is wrong. (C) "Q-Grid Iron, S-Radial" matches both identifications exactly, so it is correct. (D) "Q-Organic, R-Radial" gets both labels wrong, Q is Grid Iron not Organic, and R is Linear not Radial, so it is wrong.
Step 4: Final Answer:
Options (A) and (C) are the correct labellings, so the answer is 1,3.