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Four children were born at City Hospital yesterday. Assume each child is equally likely to be a boy or a girl. Which of the following outcomes is most likely? 

(1) all $4$ are boys 
(2) all $4$ are girls 
(3) $2$ are girls and $2$ are boys 
(4) $3$ are of one gender and $1$ is of the other gender 
(5) all of these outcomes are equally likely 