Which of the following is/are cited by the scientists as evidence/evidences for the continued expansion of the universe? 1. Detection of microwaves in space 2. Observation of redshift phenomenon in space 3. Movement of asteroids in space 4. Occurrence of supernova explosions in space

Explanation

Option (a) is correct: Evidence for the universe’s expansion includes the detection of cosmic microwave background radiation and the observation of redshift, indicating that distant galaxies are moving away from us. Movement of asteroids and supernovae are not direct evidence of universal expansion.