The molecule geometry of a molecule with one bond and three lone pairs can be described as "angular" or "bent." However, since this option is not listed, the best fit among the provided options would be "linear."
In reality, the molecular geometry (considering the arrangement of the bonded atoms) can be referred to as "angular" while the electron geometry, considering lone pairs as well, is tetrahedral since there are four regions of electron density (one bond and three lone pairs). But among the choices you provided, "linear" is the most applicable as it implies that the molecule is structured in a straight line, which is somewhat accurate for a single bond with lone pairs.
So, the answer is: • linear
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