Question: Which Mountain is closer to Afghanistan  Kabru or Gasherbrum IV ?

Context paragraphs:
Gasherbrum I: Gasherbrum I (Urdu: ‎ ; ), surveyed as K5 and also known as Hidden Peak, is the 11th highest mountain in the world at 8080 m above sea level.  It is located on the Pakistani–Chinese border in Gilgit–Baltistan region of Pakistan and Xinjiang region of China.  Gasherbrum I is part of the Gasherbrum massif, located in the Karakoram region of the Himalaya.  Gasherbrum is often claimed to mean "Shining Wall", presumably a reference to the highly visible face of the neighboring peak Gasherbrum IV; but in fact it comes from "rgasha" (beautiful) + "brum" (mountain) in Balti, hence it actually means "beautiful mountain."

Burji La: Burji La (or Burji Pass) is a natural pass in mountains between Skardu and Deosai National Park in Gilgit Baltistan, Pakistan.  Its elevation is 4816 meters.  It is famous especially for its beautiful panoramic view of so many mountain peaks, including that of K2, Nanga Parbat, Masherbrum, Chogolisa, Laila Peak, Golden Peak, Gasherbrum I, Gasherbrum II, Gasherbrum IV and a part of Broad Peak mountain.

Karakoram: The Karakoram, or Karakorum is a large mountain range spanning the borders of Pakistan, India, and China, with the northwest extremity of the range extending to Afghanistan and Tajikistan.  It is located in the regions of Gilgit–Baltistan (Pakistan), Ladakh (India), and southern Xinjiang (China), and reaches the Wakhan Corridor (Afghanistan).  A part of the complex of ranges from the Hindu Kush to the Himalayan Range, it is one of the Greater Ranges of Asia.  The Karakoram is home to the four most closely located peaks over 8000m in height on earth: K2, the second highest peak in the world at 8611 m , Gasherbrum I, Broad Peak and Gasherbrum II.

Gasherbrum: Gasherbrum (Urdu: گاشر برم‎ ) is a remote group of peaks located at the northeastern end of the Baltoro Glacier in the Karakoram range of the Himalaya on the border of the Chinese-administered Shaksgam Valley and the Gilgit-Baltistan territory of Pakistan.  The massif contains three of the world's 8,000 metre peaks (if Broad Peak is included).  Although the word "Gasherbrum" is often claimed to mean "Shining Wall", presumably a reference to the highly visible face of Gasherbrum IV, it comes from "rgasha" (beautiful) + "brum" (mountain) in Balti, hence it actually means "beautiful mountain".

Gasherbrum III: Gasherbrum III (Urdu: گاشر برم -3‎ ; ), surveyed as K3a, is a summit in the Gasherbrum massif of the Baltoro Muztagh, a subrange of the Karakoram on the border between Xinjiang, China and Gilgit-Baltistan, Pakistan.  It is situated between Gasherbrum II and IV.

Kabru: Kabru is a mountain in the Himalayas on the border of eastern Nepal and India.  It is part of a ridge that extends south from Kangchenjunga and is the southernmost 7000 m peak in the world.

Walter Bonatti: Walter Bonatti (] ; 22 June 1930 in Bergamo – 13 September 2011 in Rome) was an Italian mountain climber, explorer and journalist.  He was noted for his many climbing achievements, including a solo climb of a new route on the south-west pillar of the Aiguille du Dru in August 1955, the first ascent of Gasherbrum IV in 1958 and in 1965 the first solo climb in winter of the North face of the Matterhorn on the mountain's centenary year of its first ascent.  Immediately after his extraordinary solo climb on the Matterhorn Bonatti announced his retirement from professional climbing at the age of 35 and after 17 years of climbing activity.  He authored many mountaineering books and spent the remainder of his career travelling off the beaten track as a reporter for the Italian magazine "Epoca".

Machulo La: Machulo La is a mountain view point which is considered the most easiest way to view some of the most highest peaks of Himalayas and Karakoram mountains in a single glance such as K2, Broad Peak, Gasherbrum-I, Gasherbrum-II, Gasherbrum III, Gasherbrum IV, K7, K6 and Nanga Parbat.

Wojciech Kurtyka: Wojciech Kurtyka (also "Voytek" Kurtyka, born 25 July 1947, in Skrzynka near Kłodzko) is a Polish mountaineer and rock climber, one of the pioneers of the alpine style of climbing the biggest walls in the Greater Ranges.  He lived in Wrocław up to 1974 when he moved to Kraków.  He graduated as engineer in electronics (in 1973 at Wrocław University of Technology).  In 1985 he beat "Shining Wall" Gasherbrum IV, which the magazine "Climbing" declared beat the wall to get the greatest achievement of mountaineering in the twentieth century.  In 2016, he received the Piolet d'Or for lifetime achievement mountain.

Gasherbrum IV: Gasherbrum IV (Urdu: گاشر برم -4‎ ; ), surveyed as K3, is the 17th highest mountain on Earth and the 6th highest in Pakistan.  It is one of the peaks in the Gasherbrum massif.

Supporting paragraphs: Kabru Gasherbrum IV
Answer: Gasherbrum IV