class ServiceClass $\{$

public static IService getInstance$($string serviceChoice$)\{$

IService service $=$ null;

switch $($serviceChoice$)$

$\{$

case "Car":

service $=$ new Car$()$;

break;

case "Limo":

service $=$ new Limo$()$;

break;

$\}$

return service;

$\}$

$\}$

The above sample code is an implementation of the?

class ServiceClass $\{$

public static IService getInstance$($string serviceChoice$)\{$

IService service $=$ null;

switch $($serviceChoice$)$

$\{$

case "Car":

service $=$ new Car$()$;

break;

case "Limo":

service $=$ new Limo$()$;

break;

$\}$

return service;

$\}$

$\}$

The above sample code is an implementation of the?

Factory Pattern

Command Pattern

Observer Pattern

Singleton Pattern