The test statistic $t=\frac{191-199}{\sqrt{\frac{(38)^2}{8}+\frac{(12)^2}{10}}}=-0.57$ Identity correct set of values of given options :

$\overline{x}_1=191, s_1=12, s_2=38$ $\overline{x}_1=199, s_1=38, n_2=10$ $\overline{x}_1=191, s_1=38, n_1=8$ $\overline{x}_1=191, s_1=12, n_2=10$

$\overline{x}_1=191, s_1=38, n_1=8$