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_year: 
2017
question_exam: 
CDS-I
stats: 
0,80,312,16,200,40,136