How to delete rows on Different criteria in Power Query

Hi everyone,
I have three columns to in Excel file and I want the solution in Power Query.
Here are the complete details:

Column A Column B
U UU
U SIT
U QI
Z SIT
V SIT
V QI
V UU
Z2 SIT
Z UU
Z QI
Z SIT
Z2 QI
Z QI
Z2 SIT
Z2 SIT
Z QI
Z2 SIT


I need to remove only specific rows where Column A contains Z and Z2 and column B contains QI and UU.
In other words I just want to keep all vaue for column A except for Z and Z2 I need only SIT value in column B. Please help me to solve this issue in Power Query.

Thanks,
Rose

Power Query

let
    Source = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
    #"Filtered Rows" = Table.SelectRows(Source, each [Column A] <> "Z" and [Column A] <> "Z2" and [Column B] <> "UU" and [Column B] <> "QI")
in
    #"Filtered Rows"

This is not what I want, I just want to delete Z and Z2 in column A which contains UU and QI and all the other data should come like in column A we have U, Z and V this data should come

This is not what I want, I just want to delete Z and Z2 in column A which contains UU and QI and all the other data should come like in column A we have U, Z and V this data should come

maybe this

Column A	Column B		Column A	Column B
U	UU		U	UU
U	SIT		U	SIT
U	QI		U	QI
Z	SIT		Z	SIT
V	SIT		V	SIT
V	QI		V	QI
V	UU		V	UU
Z2	SIT		Z2	SIT
Z	UU		Z	SIT
Z	QI		Z2	SIT
Z	SIT		Z2	SIT
Z2	QI		Z2	SIT
Z	QI
Z2	SIT
Z2	SIT
Z	QI
Z2	SIT

let
    Source = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
    Merge = Table.CombineColumns(Source,{"Column A", "Column B"},Combiner.CombineTextByDelimiter("=", QuoteStyle.None),"Merged"),
    TSR = Table.SelectRows(Merge, each ([Merged] <> "Z2=QI" and [Merged] <> "Z=QI" and [Merged] <> "Z=UU")),
    Split = Table.SplitColumn(TSR, "Merged", Splitter.SplitTextByDelimiter("=", QuoteStyle.Csv), Table.ColumnNames(Source))
in
    Split

Yes, this is I want, Thanks a Bunch !

Or so?

let
    Source = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
    #"Added Conditional Column" = Table.AddColumn(Source, "Custom", each if [Column B] = "SIT" then [Column B] else null),
    #"Filtered Rows" = Table.SelectRows(#"Added Conditional Column", each ([Custom] = "SIT")),
    #"Removed Columns" = Table.RemoveColumns(#"Filtered Rows",{"Custom"})
in
    #"Removed Columns"