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Assertion $(A)$ : Vernalization is acceleration of subsequent flowering by low temperature treatment.
Reason $(R)$ : Site of vernalization is apical meristem.
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
If the Assertion is correct but Reason is incorrect.
If both the Assertion and Reason are incorrect.
Solution
The physiological mechanism of flowering in plants is controlled by two factors- light period and low temperature. The cold treatment of plants to induce flowering is called vernalization. Term vernalization was first given by $T.D.$ Lysenko $(1928)$. As a result of vernalization a flowering hormone called vernaline is formed. Site of vernalization is apical meristem.
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