The electronic configuration for the noble gas is 1s2 2s2 2p6.
Noble gases are elements in Group 18 of the periodic table. They are known for their stability due to having a complete valence shell of electrons. The electronic configuration 1s2 2s2 2p6 corresponds to the noble gas Neon (Ne). This configuration indicates that Neon has a total of 10 electrons, with 2 in the 1s orbital, 2 in the 2s orbital, and 6 in the 2p orbital, making its outermost shell completely filled.
Options like 1s2 2s2 2p5 (option b) and 1s2 2s2 2p6 3s2 3p6 4s2 (option c) do not represent noble gases. Option b is missing one electron in the 2p orbital, and option c represents an element with an incomplete valence shell. Option d, 1s2 2s2, is incomplete and does not represent any noble gas.