Recently, scientists observed the merger of giant 'blackholes' billions of light- years away from the Earth. What is the significance of this observation?
(a)
'Higgs boson particles' were detected.
(b)
'Gravitational waves' were detected.
(c)
Possibility of inter-galactic space travel through 'wormhole' was confirmed.
(d)
It enabled the scientists to understand 'singularity'.