Consider the following statements regarding the symptoms of wilt of arhar and choose the correct answer:
1. The susceptible plants are attacked when young - about five to six weeks old
2. The first symptom is the premature yellowing of the leaves
3. The leaves appear to be affected progressively from the bottom towards the top
4. Sudden wilting is rare

A. Only 2 and 3 are true

B. Only 2, 3 and 4 are true

C. Only 1 and 3 are true

D. 1, 2, 3 and 4 are true

Answer: Option D