Let’s analyze each statement:

Statement-I: India, despite having uranium deposits, depends on coal for most of its electricity production. This statement is correct. Although India has some uranium deposits, they are not sufficient to meet the country’s nuclear energy needs. As a result, India imports uranium and heavily relies on coal, which is abundant and cheaper, for most of its electricity production.

Statement-II: Uranium, enriched to the extent of at least 60%, is required for the production of electricity. This statement is incorrect. For nuclear reactors used in electricity production, uranium is typically enriched to about 3-5% U-235. Enrichment levels of 60% and above are considered high and are used for research reactors or weapons-grade material, not for commercial electricity generation.

Therefore, the correct answer is: Statement-I is correct but Statement-II is incorrect.

Let’s evaluate the above statements:

1. Amarkantak Hill:
   • Recognized as a significant natural heritage site.
   • Serves as the junction of the Vindhya and Satpura Ranges.
   • Therefore, statement 1 is INCORRECT.
2. Biligirirangan Hills:
   • Located in the southeastern region of Karnataka.
   • The Satpura Range, in contrast, begins in eastern Gujarat and extends eastward, bordering Maharashtra and Madhya Pradesh, ultimately reaching Chhattisgarh.
   • Hence, statement 2 is INCORRECT.
3. Seshachalam Hills:
   • Part of the Eastern Ghats in southern Andhra Pradesh.
   • The Western Ghats, however, span across several states including Kerala, Tamil Nadu, Karnataka, Goa, Maharashtra, and Gujarat.
   • Thus, statement 3 is INCORRECT.

Therefore, the correct answer is None.

Indonesia has rapidly ascended to the position of the world’s second-largest cobalt producer, leading to a substantial decline in the price of this essential battery metal and intensifying Western concerns over China’s stronghold in the electric vehicle supply chain. Last year, the Southeast Asian nation produced 9,500 tonnes of cobalt, representing 5 percent of the global supply, a significant leap from its negligible production levels before 2021. Nevertheless, Indonesia still trails significantly behind the Democratic Republic of Congo, the top global supplier, which commands a dominant 73 percent share of the market. So, the correct answer is: The Democratic Republic of the Congo

The best example of repeated falls in sea level, giving rise to present-day extensive marshland, is: Rann of Kutch. The Rann of Kutch in Gujarat, India, is a vast salt marshland that was formed due to the geological processes involving tectonic activity and fluctuations in sea level over time. These repeated sea level changes have contributed to the unique landscape of salt flats and marshes in the region.

Let’s evaluate each pair:

1. Kamaraj Port : First major port in India registered as a company This is correct. Kamaraj Port, formerly known as Ennore Port, was the first major port in India to be registered as a company under the Companies Act, 1956.
2. Mundra Port : Largest privately owned port in India This is correct. Mundra Port, located in Gujarat, is the largest privately owned port in India, operated by Adani Ports and SEZ Limited.
3. Visakhapatnam Port : Largest container port in India This is incorrect. The largest container port in India is Jawaharlal Nehru Port (Nhava Sheva) near Mumbai, not Visakhapatnam Port.

Based on the evaluation, two of the pairs are correctly matched. The correct answer is: Only two pairs