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    Question

    Which of the following statements about extent of

    infection and perpetuation of pathogen are correct? (A) Disease which is confined to a particular part or organ is known as systemic disease (B) Arhar wilt is a soil-bome disease (C) Smut disease of cereals are seed-bome (D) Mildew and rusts are air-bome. Choose the correct answer from the options given below.
    A (A), (C) and (D) only. Correct Answer Incorrect Answer
    B (B) and (D) only. Correct Answer Incorrect Answer
    C (A), (B) and (D) only. Correct Answer Incorrect Answer
    D (B), (C) and (D) only. Correct Answer Incorrect Answer

    Solution

    (B) Arhar wilt is a soil-borne disease: True, it primarily affects the plant through soil. (C) Smut disease of cereals are seed-borne: True, smut spores can contaminate seeds and transmit the disease. (D) Mildew and rusts are air-borne: True, spores of these diseases are typically spread through the air.

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