The most stable carbocation among the following is:

Carbocation stability follows the order: $3^{\circ }>2^{\circ }>1^{\circ }$ due to inductive effect and hyperconjugation.$(C{H}_3{)}_3{C}^{+}$ (Tert-butyl cation) is $3^{\circ }$ and has 9 hyperconjugative hydrogens.$(C{H}_3{)}_{2}C{H}^{+}$ is $2^{\circ }$.$C{H}_{3}C{H}_2^{+}$ is $1^{\circ }$.$C_6{H}_{5}C{H}_2^{+}$ (Benzyl cation) is stabilized by resonance.While resonance usually wins, the tert-butyl cation is exceptionally stable. In the standard NEET 2019 context comparing these specific options, the $3^{\circ }$ alkyl cation $(C{H}_3{)}_3{C}^{+}$ is considered most stable.