Which one of the following elements is a non-metal but is lustrous ?

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Q: (CDS-I/2021)

Which one of the following elements is a non-metal but is lustrous ?

question_subject: 

Science

question_exam: 

CDS-I

stats: 

0,27,42,3,15,24,27

keywords: 

{'germanium': [0, 0, 0, 1], 'elements': [0, 0, 2, 5], 'silicon': [0, 0, 1, 0], 'iodine': [2, 1, 1, 1], 'carbon': [1, 0, 4, 5]}