Which of the following processes represents a gamma-decay?

When an element ${}_{90}^{232}Th$ decays into ${}_{82}^{208}Pb$,the number of $\alpha$ and $\beta^{-}$ particles emitted respectively are

The number of $\alpha$ and $\beta^-$ particles emitted during the radioactive decay chain starting from ${}_{88}^{226}Ra$ and ending at ${}_{82}^{206}Pb$ is:

An artificial radioactive decay series begins with unstable $_{94}^{241}Pu$. The stable nuclide obtained after eight $\alpha$-decays and five $\beta$-decays is

Originally, radioactive beta decay was thought to be a decay of a nucleus with the emission of electrons only (Case $I$). However, in addition to the electron, another (nearly) massless and electrically neutral particle is also emitted (Case $II$). Based on the figure below, which of the following is correct?

$_6^{12}C$ absorbs an energetic neutron and emits a beta particle. The resulting nucleus is