${ }^{n} C_{2}+{ }^{n} C_{3}+{ }^{n+1} C_{4}$ এর মান কত ?

${ }^{4} \mathrm{C}_{4}$

${ }^{n+1} C_{4}$

${ }^{n+2} C_{4}$

${ }^{n+2} C_{3}$