Consider the code of two processes

P$1$:

while $($true$)\{$

$p=$ true;

while $(q==$ true$)\{$

$//$CS

$p=$ false;

$\}$

$\}$

P$2$:

while $($true$)\{$

$q=$ true;

while $(p==$ true$)\{$

$//$CS

$q=$ false;

$\}$

$\}$

Select one:

a$.$ mutual exclusion is not satisfied but code is deadlock free

b$.$ code might cause deadlock but mutual exclusion is satisfied

c$.$ mutual exclusion is not satisfied and code might cause deadlock

d$.$ Mutual exclusion is satisfied and code is deadlock free