Correct option is : (4) \(\mathrm{K}_{\mathrm{p}}<\mathrm{K}_{\mathrm{e}}\)
De Broglie wavelength of proton & electron \(=\lambda\)
\(\because\ \lambda=\frac{\mathrm{h}}{\mathrm{p}}\)
\(\therefore \ \mathrm{p}_{\text {proton }}=\mathrm{p}_{\text {electron }}\)
\(\because \ \mathrm{KE}=\frac{\mathrm{p}^{2}}{2 \mathrm{m}}\)
\(\therefore \ \mathrm{KE}_{\text {proton }}<\mathrm{KE}_{\text {electron }}\)
\(\left[\mathrm{K}_{\mathrm{p}}<\mathrm{K}_{\mathrm{e}}\right]\)