Which of these is NOT one of the Seven Summits?

Here is the question :

WHICH OF THESE IS NOT ONE OF THE SEVEN SUMMITS?

Here is the option for the question :

• Vinson Massif
• Mt. Aconcagua
• Mt. Kosciuszko
• K2

The Answer:

And, the answer for the the question is :

Explanation:

[STC001938] Ever since American mountaineer Pat Morrow completed the ascent of all Seven Summits in 1985, mountaineers all over the world have set their sights on accomplishing the incredible achievement. The ascent of the highest peaks on each of the seven continents is not something that can be accomplished by inexperienced mountaineers; rather, it calls for years of practice and a level of expertise that very few people in the world have. In ascending order, you must climb Papua New Guinea’s Carstensz Pyramid (16,024 feet) OR Australia’s Mt. Kosciuszko (7,310 feet), Antarctica’s Vinson (16,067 feet), Europe’s Elbrus (18,510 feet), Africa’s Kilimanjaro (19,343 feet), North America’s Denali (20,320 feet), South America’s Aconcagua (22,841 feet), and, of course, the tallest mountain on Earth, Asia’s Everest (29,035 feet). Even though K2 is another popular mountain and has a height of 28,251 feet, it is not considered one of the Seven Summits because Everest is taller than it by a margin of less than 800 feet.