Consider the following four measures $(I-I V)$ that could be taken to successfully grow chickpea in an area where bacterial blight is common.

$I.$ Spray with Bordeaux mixture.

$II.$ Control of the insect vector of the disease pathogen.

$III.$ Use of disease-free seeds only.

$I V$. Use of varieties resistant to the disease.

Which of the above measures can control the diseases?

• A

  $I, I I$ and $I V$

• B

  $I, I I I$ and $I V$

• C

  $I I, I I I$ and $I V$

• D

  $I, I I$ and $I I I$