Question

Which of the following statements are correct?
i)
ii)
sound is produced by vibrations.
Sound requires a medium for propagation.
Light and sound both require a medium for propagation.
Sound travels slower than light.
iv)
i and ii only
O
i, ii and iii only.
i, ii and iv only
O ii, iii and iv only.​

Answer 1

Answer:

I1, 2 and 4th

is correct

9th grade?

Answer 2

Answer:

I, and ii only

Explanation:

1 and 2 is your right answer