भू-आकृतिक अवधारणाओं और उनके प्रतिपादकों के निम्नलिखित युग्मों पर विचार कीजिए: 1. एकरूपतावाद (Uniformitarianism) – जेम्स हटन (Theory of the Earth)2. सागर नितल प्रसरण सिद्धांत – लोथियन ग्रीन3. गतिज संतुलन सिद्धांत (Dynamic Equilibrium Theory) – जी. के. गिलबर्ट4. टेक्नो-जियोमॉर्फिक मॉडल – मैरी मोरिसवा उपर्युक्त में से कौन-से युग्म सही सुमेलित हैं?

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?