Assume that a physical main memory contains $3$ page$-$frames. Given the following page reference

sequence:

$7,2,3,1,2,5,3,4,6,7,7,1,0,5,4,6,2,3,0,1$

a$.,$ Page faults using LRU$=18,$ using FIFO $=17,$ using optimal replacement $=13$

b$.$ Page faults using LRU$=18,$ using FIFO $=17,$ using optimal replacement $=12$

c$.,$ Page faults using LRU$=17,$ using FIFO $=16,$ using optimal replacement $=12$

d$.$ Page faults using LRU$=17,$ using FIFO$=16,$ using optimal replacement $=13$

solve and be carfole need the correct one only double chack it