Answer is option 3
option 1-Large programs can be written.
True because entire program need not be in main memory at a time.
option 2-More I/O is needed.
True because we are not bringing entire program into memory at a time .i.e, bring when needed.Hence more i/o is needed.
option 3-More addressable memory available.This is false because the amount of memory addressable by C.P.U depends on size of address bus
Option 4--Faster and easy swapping of process.This is true because we aren't bringing entire program .instead we bring it in parts i.e the amount of data to be brought to main memory and data to be written to disk is less.
Hence less time for swapping