Tube A has both ends open, while tube B has one and closed, otherwise they are identical the ratio of fundamental frequency of tubes A and B is

Tube A has both ends open, while tube B has one and closed, otherwise

1.	Tube A has both ends open, while tube B has one and closed, otherwise they are identical the ratio of fundamental frequency of tubes A and B is
Answer» `1:2` `1:4` `2:1` `4:1` ANSWER :C