Which of the following statements is/are correct? 1. In June 2016, the LIGO group of scientists announced the detection of a second set of gravitational waves. 2. Gravitational waves were generated due to merger of two black holes at about 1-4 billion lig

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Q: 76 (CDS-I/2017)

Which of the following statements is/are correct?
1. In June 2016, the LIGO group of scientists announced the detection of a second set of gravitational waves.
2. Gravitational waves were generated due to merger of two black holes at about 1-4 billion light-years distant.
3. Gravitational waves were inserted due to collision of two white dwarf stars at about 1 -4 billion light-years distant.
Select the correct answer using the code given below.

question_subject: 

Science

question_exam: 

CDS-I

stats: 

0,23,63,3,38,7,38

keywords: 

{'gravitational waves': [0, 0, 0, 2], 'black holes': [0, 0, 0, 1], 'white dwarf stars': [0, 0, 0, 1], 'second set': [0, 0, 0, 1], 'ligo group': [0, 0, 0, 1], 'collision': [0, 0, 0, 1], 'detection': [0, 0, 0, 2]}