What is the causes of abnormal wood (CW/TW)?

Utilization of Forest Products Mcqs
BILAL KHATTAK0

A.To Evarts and Mason (106) it is due to gravity
B.Metzger (1908) says it is due to tension and compression
C.Wersking and Baily, due to (1942) increase or decrease in plant hormones
D.Philips says (1940), it is due to wind
E.All of the above

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