Question: Which mountain is taller, Istor-o-Nal or Siguang Ri?

Context paragraphs:
Gray Mountain (Missouri): Gray Mountain is a summit in the northwestern of Wayne County in the U.S. state of Missouri.  Gray Mountain has an elevation of 722 ft .  Gray Mountain lies above the St. Francis River to the southeast.  The taller Graves Mountain lies just to the northwest and extends into Madison County south of Beulah.  Graves Mountain State Forest includes portions of Gray Mountain.  Missouri Route 143 passes by to the west.

Titiri: Titiri (Aymara "titi" Andean mountain cat; lead, "-(i)ri" a suffix, also spelled "Titire") is a 4560 m mountain in the Andes of southern Peru.  It is situated in the Tacna Region, Tarata Province, on the border of the districts Tarata and Ticaco.  Titiri lies near the village of Ch'allapallqa "(Challapalca)" southwest of the mountain Tuma Tumani.  The Mawri River "(Mauri)" flows along its northern slopes.

Langtang Ri: Langtang Ri is a mountain in the Langtang Himal of the Himalayas.  At an elevation of 7205 m it is the 106th highest mountain in the world.  Located on the border between the Bagmati Zone of Nepal and Tibet, China, it is part of a group of high peaks that include Shishapangma (8,013 m) and Porong Ri (7,292 m).

Num Ri: Num Ri is a mountain in the Khumbu region of the Nepalese Himalayas.  Num Ri consists of a long ridge that culminates eastwards in a pyramid summit.  Neighbouring mountains are Island Peak, Baruntse and Cho Polu.

Kongde Ri: Kongde Ri (sometimes Kwangde Ri) is a mountain in the Himalaya of eastern Nepal.  The mountain is located four km west of Namche Bazaar.

Level Mountain: Level Mountain is an immense volcanic massif in the Northern Interior of British Columbia, Canada.  It is 50 km north-northwest of Telegraph Creek and 60 km west of Dease Lake on the Nahlin Plateau.  With a maximum elevation of 2166 m , it is the third highest of five large volcanic complexes in the Northern Cordilleran Volcanic Province (NCVP).  Much of the massif is gently-sloping; when measured from its base, Level Mountain is about 1100 m tall, slightly taller than its neighbour to the northwest, Heart Peaks.  The lower broader half of Level Mountain consists of a shield-like edifice while its upper half has a more steep, jagged profile.  Its summit is dominated by the Level Mountain Range, a small mountain range with prominent peaks cut by deep valleys.  These valleys serve as a radial drainage for several small streams that flow across the volcano.  Meszah Peak is the only named peak in the Level Mountain Range.

Kunturiri (Bolivia-Chile): Kunturiri (Aymara "kunturi" condor, "-ri" a suffix, Hispanicized spelling "Condoriri") is a volcano in the Andes on the border of Bolivia and Chile which rises up to 5762 m .  On the Chilean side it is located in the Arica and Parinacota Region and on the Bolivian side in the Oruro Department, Sajama Province, Curahuara de Carangas Municipality, Sajama Canton as well as in the La Paz Department, Pacajes Province, Calacoto Municipality, Ulloma Canton.  Kunturi lies south-west of the mountain Jach'a Kunturiri ("big Kunturiri"), west of Jisk'a Kunturiri ("small Kunturiri") and north-west of Patilla Pata.  The mountain west of Kunturiri on the border is named Laram Q'awa, not to be confused with the mountain Laram Q'awa north-west of Kunturiri and the mountain Phaq'u Q'awa.

Pumori: Pumori (Nepali: पुमोरि ) (or Pumo Ri) is a mountain on the Nepal-Tibet border in the Mahalangur section of the Himalayas.  Pumori lies just eight kilometres west of Mount Everest.  Pumori, meaning "the Mountain Daughter" in Sherpa language, was named by George Mallory.  "Pumo" means young girl or daughter and "Ri" means mountain in Sherpa language.  Climbers sometimes refer to Pumori as "Everest's Daughter".  Mallory also called it Clare Peak, after his own daughter.

Istor-o-Nal: Istor-o-Nal or इस्तोर-ओ-नल is the third highest mountain in the Hindu Kush, in the Chitral District of the North-West Frontier Province of Pakistan.  It is the 68th highest independent peak in the world.  It crowns a massif with eleven peaks of elevation more than 7000 m .  The peak is located a few kilometres northeast of Tirich Mir (the highest mountain in the Hindu Kush), across the Tirich Glacier.  Because Istor-o-Nal is behind the higher peak of Tirich Mir from many viewpoints, it is not easily visible and therefore not well known.

Siguang Ri: Siguang Ri is a mountain in the Mahalangur Himalayas of Tibet, China.  At an elevation of 7308 m it is the 83rd highest peak on Earth.  It is located approximately 6 kilometers NNE of Cho Oyu, the world's 6th highest mountain.

Supporting paragraphs: Istor-o-Nal Siguang Ri
Answer: Istor-o-Nal