Which one of the following statements is correct ?

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Q: 125 (RAS/2013)

Which one of the following statements is correct ?

question_subject: 

Science

question_exam: 

RAS

stats: 

0,2,11,5,2,5,1

keywords: 

{'nanoear': [0, 0, 0, 1], 'single silica nano particle': [0, 0, 0, 1], 'single silver nano particle': [0, 0, 0, 1], 'sound levels': [0, 0, 0, 1], 'sound': [4, 3, 10, 15], 'nonoear': [0, 0, 0, 1]}

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