Which of the following statement is/are true?
(i) Ridge canals can irrigate areas on both sides.
(ii) In contour canal, cross drainage works are not required.
(iii) Side slope canals are aligned roughly at right angles to the contour of the country.
1
(i) and (iii)
2
(i) and (ii)
3
Only (i)
4
All are correct.