नीचे दिए गए कूट का प्रयोग कर उत्तर चुनिए।

Correct Option: (a) 3 and 4 only

Let's evaluate the statements based on the convergence theory passage. Statement 1 is incorrect because in the breakaway phase, the per capita income of technology leaders rises while it is unchanged for followers, implying slow or stagnant relative progress, but the phrase 'economic progress is slow for the technology followers' doesn't quite capture the exact technical nuance or is partially incorrect as they don't grow yet. Wait, let's check Statement 2: 'In the catch-up phase, leaders stagnate and followers, therefore, close the gap'—the passage states leaders' income already rose in breakaway, but in catch-up followers adopt the tech and close the gap; it does not say leaders stagnate. Statement 3 is correct: 'In the fine-tuning phase, where participants try to extract the remaining benefits from an increasingly exhausted technology, leaders and followers have similar per capita incomes.' Statement 4 is correct: The text lists the development chronologically: scavenging (3 MYA) -> hunting (1 MYA) -> farming (12 thousand years ago) -> industrial technology (200 years ago). So industrial technology followed scavenging, which preceded hunting, which itself was followed by farming (Wait, scavenging preceded hunting, and hunting preceded farming, and industrial technology followed). Let's verify statement 4: 'Industrial technology followed scavenging, which preceded hunting, which itself was followed by farming.' Yes, scavenging (3 MYA) preceded hunting (1 MYA), and hunting was followed by farming (12k YA). Therefore, 3 and 4 are correct.