The correct structures of trans- and meridional- respectively, are:
(Options show structural diagrams — select the one with Br trans to each other in square planar, and NO₂ in meridional arrangement)

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Strategy:
 Interpret IUPAC nomenclature and stereochemical descriptors to predict structure.

Step 1: trans-
-  with strong/bulky ligands like triphenylphosphine typically forms a square planar complex ().
- The term trans- implies that the two identical ligands (the two  ions, and the two  groups) are positioned exactly opposite each other ( apart) across the square plane.

Step 2: meridional-
- An octahedral complex of type .
- The meridional (mer-) isomer features three identical ligands posi

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