Complete the following series:

$24,60,120,210,?$

The correct option is C $336$
The pattern is + 36, + 60, + 90, .. i.e. $+[6\times (6+0\left)\right]$, $+[6\times (6+4\left)\right]$, $+[6\times (6+9\left)\right]$,.....
So, missing term $=210+[6\times (6+15\left)\right]=210+126=336$
Hence,option B is the correct answer.