Assertion (A): Sound barriers alongside motorways in urban areas are very effective in controlling noise.
Reason (R): They act as reflectors of sound back into motorways and upwards.
Choose the correct answer:
1
Both (A) and (R) are correct and (R) is the correct explanation of (A).
2
Both (A) and (R) are correct and (R) is not the correct explanation of (A).
3
(A) is true but (R) is false.
4
(A) is false but (R) is true.