Phản ứng nào sau đây là phản ứng phân hạch?

$_{92}^{235}\textrm{U}+n\rightarrow _{42}^{95}\textrm{Mo}+_{57}^{139}\textrm{La}+2n+7e$

$_{9}^{19}\textrm{F}+_{1}^{1}\textrm{H}\rightarrow _{8}^{16}\textrm{0}+_{1}^{2}\textrm{He}$

$_{1}^{2}\textrm{H}+_{1}^{3}\textrm{H}\rightarrow _{2}^{4}\textrm{He}+_{0}^{1}\textrm{n}$

$_{1}^{2}\textrm{H}+_{1}^{2}\textrm{H}\rightarrow _{2}^{3}\textrm{He}+_{0}^{1}\textrm{n}$