वक्रता सूचकांक (SI) श्रेणियों (सूची I) को उनके संबंधित नदी प्रकारों (सूची II) से सुमेलित कीजिए: सूची I: A. SI = 1.0 B. 1.0 2.0 सूची II: I. संक्रमणकालीन / वक्र नदी II. सीधी नदी III. नियमित विसर्पी (मीँडरिंग) नदी IV. अत्यधिक विसर्पी (टॉर्टुअस) नदी

The crescent-shaped sand dunes found in Sam, Jaisalmer are scientifically known as:

With reference to fjords, consider the following statements: I. They are deep, narrow inlets carved mainly by glaciers and later occupied by seawater. II. The shallow sill near their mouth is generally associated with glacial deposition rather than with tectonic uplift alone. III. They are chiefly associated with high-latitude or formerly glaciated coasts, rather than with humid tropical landscapes. How many of the statements given above are correct?