Sentence Correction (SC) | Re: Unlike the buildings in Mesopotamian cities, which were arra

Unlike the buildings in Mesopotamian cities, which were arranged haphazardly, the same basic plan was followed for all cities of the Indus Valley: with houses laid out on a north-south, east-west grid, and houses and walls were built of standard-size bricks.

Let's try to understand the sentence, there is aCOMPARISION error in this sentence. As the sentence is trying to compare the "buildings in Mesopotamian cities quot; with "the same basic plan quot; which is not a logical comparison.
...

---