consider code for i=1 to 9
initially mutex value set to be 1
so it can allow only 1 processor at a time
now p1 enter into critical section.
by this time remaining all are in block state
i.e blocked processes=2,3,4,5,6,7,8,9
but consider code for 10th process it tells that unblock any process because it contain operation. Because of this it can unblock the processor and send it to the critical section
by doing this process all processes can enter into critical section
so finally there are 10 processes at maximum can enter into critical section
answer is option d none.