Four resistors, 100Ω,200Ω,300Ω, and 400Ω...

Four resistors, 100Ω,200Ω,300Ω, and 400Ω are connected to form four sides of a square. The resistors can be connected in any order. What is the maximum possible equivalent resistance across the diagonal of the square?

`210Omega`

`240Omega`

`300Omega`

`250Omega`

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