भारत के पूर्वी तट पर स्थित सबसे गहरा, स्थलबद्ध और सुरक्षित मुख्य बंदरगाह कौन सा है?

Name the famous navigable canal constructed by the British in India running parallel to the Coromandel Coast.

Which of the following cities are connected by the Trans-Siberian Railway?

Among the following continents, where is the highest road density found?