Consider the following string of page references: $7,0,1,2,0,3,0,4,2,3,0,3,2.$

Given an empty main memory with $3$ page frames, find out the total number of page faults for the CLOCK page replacement algorithm. Count page faults only after all frames have been initialized.

$3.$a

$6*b$

$5*c$

$7.d$