How to write Conditional boolean query using Nest in c#?

Elastic Stack Elasticsearch
1 
                              .Filter(ff => ff
                                      .Bool(bb => bb
                                          .Must(mm =>
                                         mm.Terms("cityId",

filterInputs.cities) &&
mm.Terms("fuelTypeId",
filterInputs.fuels) &&
mm.Terms("sellerType",
filterInputs.sellers) &&
mm.Terms("transmissionId",
filterInputs.transmissions) &&
mm.Terms("ownerTypeId",
filterInputs.owners) &&

mm.Terms("usedCarMasterColorsId", filterInputs.colors) &&
mm.Terms("bodyStyleId",
filterInputs.bodytypes) &&
mm.Range(y =>
y.OnField("certificationId").GreaterOrEquals(filterInputs.certifiedCars)) &&
mm.Range(y =>
y.OnField("photoCount").GreaterOrEquals(filterInputs.carsWithPhotos)) &&
mm.Range(y =>
y.OnField("makeYear").GreaterOrEquals(filterInputs.yearMin).LowerOrEquals(filterInputs.yearMax))
&&
mm.Range(r =>
r.OnField("price").GreaterOrEquals(filterInputs.budgetMin).LowerOrEquals(filterInputs.budgetMax))
&&
mm.Range(k =>
k.OnField("kilometers").GreaterOrEquals(filterInputs.kmMin).LowerOrEquals(filterInputs.kmMax))
&&
mm.Terms("makeId",
filterInputs.NewMakes) ||
mm.Terms("rootId",
filterInputs.NewRoots)
)
)
)

I need query if
filterInputs.NewMakes is null then && condition with mm.Terms("rootId",
filterInputs.NewRoots) otherwise it should be || condition.

Thank in advance.

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