Find available options

Options[Plot]

{AlignmentPoint -> Center, AspectRatio -> GoldenRatio^(-1), Axes -> True, AxesLabel -> None, AxesOrigin -> Automatic, AxesStyle -> {}, Background -> None, BaselinePosition -> Automatic, BaseStyle -> {}, ClippingStyle -> None, ColorFunction -> Automatic, ColorFunctionScaling -> True, ColorOutput -> Automatic, ContentSelectable -> Automatic, CoordinatesToolOptions -> Automatic, DisplayFunction :> $DisplayFunction, Epilog -> {}, Evaluated -> Automatic, EvaluationMonitor -> None, Exclusions -> Automatic, ExclusionsStyle -> None, Filling -> None, FillingStyle -> Automatic, FormatType :> TraditionalForm, Frame -> False, FrameLabel -> None, FrameStyle -> {}, FrameTicks -> Automatic, FrameTicksStyle -> {}, GridLines -> None, GridLinesStyle -> {}, ImageMargins -> 0., ImagePadding -> All, ImageSize -> Automatic, ImageSizeRaw -> Automatic, IntervalMarkers -> Automatic, IntervalMarkersStyle -> Automatic, LabelingSize -> Automatic, LabelStyle -> {}, MaxRecursion -> Automatic, Mesh -> None, MeshFunctions -> {#1 & }, MeshShading -> None, MeshStyle -> Automatic, Method -> Automatic, PerformanceGoal :> $PerformanceGoal, PlotHighlighting -> Automatic, PlotInteractivity :> $PlotInteractivity, PlotLabel -> None, PlotLabels -> None, PlotLayout -> Automatic, PlotLegends -> None, PlotPoints -> Automatic, PlotRange -> {Full, Automatic}, PlotRangeClipping -> True, PlotRangePadding -> Automatic, PlotRegion -> Automatic, PlotStyle -> Automatic, PlotTheme :> $PlotTheme, PreserveImageOptions -> Automatic, Prolog -> {}, RegionFunction -> (True & ), RotateLabel -> True, ScalingFunctions -> None, TargetUnits -> Automatic, Ticks -> Automatic, TicksStyle -> {}, WorkingPrecision -> MachinePrecision}

Options[Plot, PlotPoints]

{PlotPoints -> Automatic}

Options[Plot, {PlotPoints, Mesh, Ticks}]

{}

PlotPoints /. Options[Plot]

Automatic