how to pass hash as radio button option

Question

am passing the hash as radio button option .. like { 1=>["a", "b"], 2=>["c"], 3=>["a", "d", "f", "g"], 4=>["q"]}

but for the first option am getting radio button, for other values am not getting it

am getting like this 1---
o a
b
2----
o c
3---
o a
b
c

can anybody give some idea about, how to pass hash as radio button option??