Which of the Following is /are Cited By The Scientists As Evidence/ evidence for the continued expansion of the universe?

Which of the following is /are cited by the scientists as evidence/ evidence 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

Select the correct answer using the codes given below(2012)

a) 1 and 2

b) 2 only

c) 1, 3 and 4

d) None of the above can be cited as evidence

Answer: A