Answer:
Alkenes react with diborane 
to form
trialkyl borane which on oxidation by 
gives alcohol.
[1]
This complete reaction is called hydroboration- oxidation
(HBO). In this [1]
(a) B is added io sp1 hybridised carbon
having greater number of H-atoms
(b) Alcohol is the product corresponding to anti-Markownikoff
addition of H2O to (C=C)
bond.
(c) Carbonation is not formed, hence no arrangement.
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