In this task, you are given a context, a subject, a relation, and many options. Based on the context, from the options select the object entity that has the given relation with the subject. Answer with text (not indexes).

Context: Banská Štiavnica is a town in central Slovakia, in the middle of an immense caldera created by the collapse of an ancient volcano. For its size, the caldera is known as Štiavnica Mountains. Banská Štiavnica has a population of more than 10,000. It is a completely preserved medieval town. Because of their historical value, the town and its surroundings were proclaimed by the UNESCO to be a World Heritage Site on December 11, 1993., Slovakia, officially the Slovak Republic, is a landlocked country in Central Europe. It is bordered by the Czech Republic and Austria to the west, Poland to the north, Ukraine to the east and Hungary to the south. Slovakia's territory spans about and is mostly mountainous. The population is over 5 million and comprises mostly ethnic Slovaks. The capital and largest city is Bratislava. The official language is Slovak, a member of the Slavic language family., Alexander ( Sándor ) Pituk ( October 26 , 1904 in Banská Štiavnica -- April 30 , 2002 in Banská Štiavnica ) was a Slovak and Hungarian chess problem composer and judge . He resided all his life in Banská Štiavnica and worked as a carpenter . He was appointed an International Judge of Chess Compositions and was awarded the FIDE Master for Chess Composition and Honorary Master of Chess Composition title . He is author of 584 compositions ( 60 of them award winners ) . His brother József Viktorián Pituk ( 1906 -- 1991 ) was an established painter in Budapest ., The Štiavnica Mountains (also Štiavnické Mountains) are a volcanic mountain range southern central Slovakia. They are part of Inner Western Carpathians and the Slovenské stredohorie Mountains. The area is protected by Štiavnica Mountains Protected Landscape Area., A caldera is a large cauldron-like depression that forms following the evacuation of a magma chamber/reservoir. When large volumes of magma are erupted over a short time period, structural support for the crust above the magma chamber is lost. The ground surface then collapses downward into the partially emptied magma chamber, leaving a massive depression at the surface (from one to dozens of kilometers in diameter). Although sometimes described as a crater, the feature is actually a type of sinkhole, as it is formed through subsidence and collapse rather than an explosion or impact. Only seven known caldera-forming collapses have occurred since the start of the 20th century, most recently at Bárðarbunga volcano in Iceland., Subject: alexander pituk, Relation: country_of_citizenship, Options: (A) hungary (B) iceland (C) slovakia (D) ukraine
hungary