The stability of dihalides of Si, Ge, Sn and Pb increases steadily in the sequence :

Question

( A ) $GeX_2 < SiX_2 < SnX_2 < PbX_2$
( B ) $SiX_2 < GeX_2 < SnX_2 < PbX_2$
( C ) $SiX_2 < GeX_2 < PbX_2 < SnX_2$
( D ) $PbX_2 < SnX_2 < GeX_2 < SiX_2$