उर्वरक उत्पादक संगठनों/इकाइयों (सूची 1) को उनके ऐतिहासिक रूप से महत्वपूर्ण प्राथमिक संयंत्र स्थानों (सूची 2) के साथ सुमेलित करें: सूची 1: 1. IFFCO, 2. NFL, 3. हिंदुस्तान फर्टिलाइजर कॉर्पोरेशन, 4. फर्टिलाइजर कॉर्पोरेशन ऑफ इंडिया सूची 2: a. दुर्गापुर, b. कलोल, c. तालचेर, d. नांगल

Consider the following statements regarding Lösch's Theory of Industrial Location: 1. He disregarded spatial variations in production costs by holding them constant. 2. He treated each function as having a separate range, threshold, and hexagonal hinterland. 3. His theory is also known as the 'Area-Cost Curve Theory'. 4. He used Isocost lines and maps to indicate the optimum location. Select the correct answer using the codes given below:

According to Weber's theory of industrial location, if an industry has a Material Index greater than 1, the most cost-effective location for the industry will be: