[aldoxime_amine]

Cholesterol + H₃O⁺ at room temperature  ?

Cholesterol + Diborane,water/H₂O₂,OH^-  ?

Predict with stereochemistry?

I'm aware of both reactions, but my doubt is this:
Should'nt in each case a pair of diastereomers be formed? The question came in an exam and the solution expected only one product....