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 $-1$;

one possible value of b at the end of execution could be

Select one:

a$.6$

b$.4$

c$.7$

d$.5$