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$.4$

b$.6$

c$.5$

d$.7$