Given the code of two processes that share the variable b whose initial value is $2,$

Process A:

c $=$ b$-1$;

b $=2*$ c

Process B:

d $=2*$ b;

b $=$ d $-1$;

how many distinct values b can have at the end of execution

Select one:

a$.3$

b$.1$

c$.4$

d$.2$