What are kinds of frost injuries?

A. Frost rings: are dark brownish lines within the growth rings as a result of injury to the cambium due to the heavy frost

B. Frost cracks: to the very much low temperature, the cracks appear at the basal portion of old trees

C. Both (a) & (b)Correct Answer

D. None of these

Correct Option: C. Both (a) & (b)

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