The cross of an inbreed line with an open pollinated variety is known as

Answer: Option B

The cross of an inbred line with an open pollinated variety is known as the Top cross.
Top cross- means the first generation of a cross between an open-pollinated variety and an inbred line, a foundation backcross, or a foundation single cross.
In the top cross, crosses are made between inbreds and either a tester or an open-pollinated variety. This is also known as an inbred-variety cross.