The correct passive form of the given sentence is:

☀ I will be called by him.

Let's break down the options:

1. I would be called by him. (Incorrect) This option uses the conditional "would be called," which changes the meaning of the original sentence. The original sentence uses "will call" to indicate a certain future action, not a conditional one.

2. I will be called by him. (Correct) This sentence correctly uses the passive voice and conveys the same meaning as the original sentence. It uses the correct form "will be called" to express the future action of being called by "him."

3. I will called by him. (Incorrect) This option omits the auxiliary verb "be" in the passive construction. The correct form should include "will be" as shown in option 2.

4. I will be ringed by him. (Incorrect) This option uses the incorrect verb "ringed" instead of "called." The original sentence is about "calling," not "ringing." The correct passive form should use "called" as shown in option 2.