Match the following ( List-I List-II (a) n arrow p + (p) α-decay...

a: ($\mathrm{n} \rightarrow \mathrm{p +} \ldots$) This represents the decay of a neutron into a proton, which is ($\beta$)-emission (($\mathrm{r}$)). - b: p ($\rightarrow \mathrm{n +}$)... This represents the decay of a proton into a neutron, which can be Positron emission (q). - c: x-ray emission X-ray emission is often associated with K electron capture (s), where an inner electron is captured by the nucleus, leading to characteristic X-rays. - d: This is an example of a-decay (p), as the atomic number decreases by 2 and the mass number by 4. Matching these gives: $a → r, b → q, c → s, d → p$. This corresponds to option (3).