In many parts of England, the farmers began to grow turnip as-
(i) Turnip improved the soil and made it fertile.
(ii) Turnip was a good fodder crop and relished by the cattle.
(iii) This crop had the capacity to increase nitrogen content of the soil.
(iv) Turnip became the staple food for the people.
Read the options given above and select the correct answer from the following.