drawing 4 or 5 in draw poker

[slimeywater]

DRAW POKER
wen u are in the big blind and there are limpers you have a free draw
you have absolutly nothing to draw to and are going to draw 4 cards
clearly if you have an ace you will draw 4 to it
but at what point do u not keep a card n discard 5 cards
ie do u keep a single king
do keep a single queen
do keep a single jack
thank you