Explanation:

In Myanmar, at least 162 people have been killed in a landslide at a jade mine in northern Kachin province. Myanmar Fire Service Department said that 162 bodies have been recovered from the landslide in Hpakant, the centre of the world's biggest and most lucrative jade mining industry. Hpakant is a rough and remote area in Kachin state, 950 kilometres north of Myanmar's biggest city, Yangon. It is located on the Uyu River. It is famous for its jade mines which produce the world's best quality jadeite. Jade refers to an ornamental mineral, mostly known for its green varieties. It can refer to either of two different minerals: nephrite, (a silicate of calcium and magnesium in the amphibole group of minerals), or jadeite, (a silicate of sodium and aluminium in the pyroxene group of minerals). Hence option 1st is correct.