The radionuclide $_{90}^{234} Th$ undergoes two successive $\beta$-decays followed by one-$\alpha$-decay. The atomic number and the mass number respectively of the resulting radionuclide are :

Question

( A ) 92 and 234
( B ) 94 and 230
( C ) 90 and 230
( D ) 92 and 230