There is a 4 way set associative cache memory with 8 cache blocks. The main memory consists of 256 blocks and the request for memory blocks is in that order:
$$0,255,1,4,3,8,133,159,216,129,63,8,48,32,73,92,155 $$
Which one of the following memory block will not be in cache if LRU replacement policy is used?
- 159
- 8
- 129
- 48