What is the output of the following $R$ code?

f function

function$($b$)\{$

$b**2$

$\}$

$a**g(dots)$

$\}$

$f(2,3)$

a$)$ Error in $g(dots)$ : argument $"$b$"$ is missing, with no default

b$)12$

c$)6$

d$)$ NA