Which Harappan city, around 2500 BCE, is noted for its dockyard, indicating advanced architectural planning for trade?

The correct option is Lothal.

Detailed Explanation:

Lothal, located in the modern state of Gujarat, India, was one of the most prominent cities of the ancient Indus Valley Civilization (Harappan Civilization), dating back to around 2500 BCE.

Key features of Lothal include:

• World's Earliest Known Dockyard: Lothal is famous for its massive, artificially basin-engineered dockyard. This structure connected the city to an ancient course of the Sabarmati River, enabling maritime trade with regions as far as Mesopotamia and Persia.

• Advanced Trade and City Planning: The presence of the dockyard, along with warehouses and seals, highlights the city's role as a major trading hub and demonstrates sophisticated civic and architectural engineering.

Overview of Other Options:

• Mohenjodaro: Famous for the 'Great Bath', street planning, and advanced drainage systems, but not specifically for a dockyard.

• Kalibangan: Known for evidence of ploughed agricultural fields and fire altars.

• Dholavira: Renowned for its unique tripartite city layout, stone architecture, and sophisticated water conservation/reservoir systems.