Final answer:
Option c, 1s²2s²2p⁶3s²3p⁶3d¹⁰, is a pseudo-noble-gas electron configuration.
Step-by-step explanation:
The pseudo-noble-gas electron configuration is represented by option c: 1s²2s²2p⁶3s²3p⁶3d¹⁰. This configuration resembles the electron configuration of a noble gas, in this case, argon (1s²2s²2p⁶3s²3p⁶), when the valence shell is complete up to the 3d orbital. The symbol [Ar] is used to represent the noble gas core that appears before the valence shell electrons in the electron configuration.