HCU MCA 2014 Paper

There are 51 houses on a street. Each house has an address between 1000 to 1099 (both inclusive). Which one of the following is definitely true ?
$\mathrm{I}$ At least one house has an odd numbered address
$\mathrm{II}$ At least one house has an even numbered address
$\mathrm{III}$ There will be more than two houses with consecutive addresses
$\mathrm{IV}$There will be more than two houses with consecutive addresses