Which of the following combinations forms the | vedclass

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(D) The strength of a covalent bond formed by head-on overlapping depends on the extent of overlapping. Greater the extent of overlapping,stronger is

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$1s$ and $1s$ orbitals

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(D) The strength of a covalent bond formed by head-on overlapping depends on the extent of overlapping. Greater the extent of overlapping,stronger is the bond. For $s$ and $p$ orbitals,the $1s$ orbital is the smallest and closest to the nucleus,leading to the maximum extent of overlapping. Therefore,the $1s-1s$ overlapping is the strongest among the given options.

Which of the following combinations forms the strongest bond by head-on overlapping?

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