The correct option is B i- c, ii- d, iii- b, iv- a
Spinach is rich is iron.
The most important source of calcium is milk and milk products.
Salt is mixed with iodine to make iodised salt.
Whole grains are fiber-rich food which helps in getting more roughage.
Thus, the correct answer is option , 'i-c, ii-d, iii-b, iv-a'.