The correct Active/Passive form of the given sentence is:

☀ The furniture was arranged in order by the servant.

Explanation for other options:

☀ The furniture has been arranged in order by the servant. This option uses the present perfect tense ("has been arranged"), which suggests a connection to the present or recent past. The original sentence is in the simple past tense, so the correct form should be "The furniture was arranged in order by the servant."

☀ The furniture were arranged in order by the servant. This option is grammatically incorrect because "furniture" is a singular noun, so the correct verb should be "was" instead of "were." The correct form should be "The furniture was arranged in order by the servant."

☀ The furniture was to be arranged in order by the servant. This option changes the meaning slightly by introducing the phrase "to be arranged," which suggests an obligation or intention rather than a direct action. The original sentence is in the simple past tense, so the correct form should be "The furniture was arranged in order by the servant."