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

☀ The bills were paid by Jai on my behalf.

Explanation for other options:

☀ The bills had paid by Jai on my behalf. This option uses "had paid," which is not the correct verb form for the passive construction. The correct form should be "were paid" to form the passive voice.

☀ The bills have been paying by Jai on my behalf. This option uses "have been paying," which is not the correct verb form for the passive construction. The correct form should be "were paid" to form the passive voice.

☀ The bills are paying by Jai on my behalf. This option uses "are paying," which is in the active voice and does not represent the correct passive form. The correct form should use the passive construction "were paid."