Consider the following four measures (1-4) that could be taken to successfully grow chickpea in an area where bacterial blight disease is common:
(i) Spray with Bordeaux mixture
(ii) Control of the insect vector of the disease pathogen
(iii) Use of only disease-free seeds
(iv) Use of varieties resistant to the disease

Options

A. (a) and (d)
B. (b) and (c )
C. (a) and (b)
D. (c ) and (d)

Answer

D