The formula for the annuity present value factor for a $30-$year annuity with an interest rate of $10$ percent per year is $\_\_\_\_\_\_.$

Multiple choice question.

$[1(1/1\mathrm{.}1030)]/\mathrm{.}10]$

$[1(1\mathrm{.}1/1\mathrm{.}1030)]/\mathrm{.}10]$

$[1(1/1\mathrm{.}1030)]/\mathrm{.}20]$

$[1(1/1\mathrm{.}2030)]/\mathrm{.}10]$