Which of the following statements are correct? (i) To remove seed dormancy by mechanical removal...

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Which of the following statements are correct?
(i) To remove seed dormancy by mechanical removal of seed coat is called scarification.
(ii) Vernalisation is done at low temperature.
(iii) The presence of auxins in a solution could be tested by Avena sativa stem tip test.
(iv) The photoperiodic stimulus is perceived by leaves.
(A) (i) and (ii)
(B) (ii), (iii) and (iv)
(C) (iii) and (iv)
(D) (i), (ii), (iii) and (iv)
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