"If given the choice who to donate to"，Right or Wrong？THX!
If given the choice who to donate to，I would too choose students struggling with financial difficulties.
"If given the choice who to donate to"，Right or Wrong？THX!

Question

"If given the choice who to donate to"，Right or Wrong？THX!
If given the choice who to donate to，I would too choose students struggling with financial difficulties. 
"If given the choice who to donate to"，Right or Wrong？THX!

Answer

It's perfectly fine and natural for spoken English. If you want to be really elegant, you could say "If given the choice to whom to donate...."

Answer

Wrong.
"If given the choice who would you donate to?"
Would be correct.