Consider the following for loop:

for i $=1$:$20$

b$($i$)=$ i$+1$;

g$($i$)=$ b$($i$)-1$;

end

Select the true statements:

a$.$

It runs $21$ times, and g$(14)$ is $14.$

b$.$

It runs $20$ times, and g$(14)$ is $14.$

c$.$

It runs $19$ times, and b$(3)$ is $4.$

d$.$

It runs $20$ times, and b$(3)$ is $4.$