Changing "It is strange that families adopt dogs but not a child." into passive voice

Question

When trying to convert this sentence into passive voice

It is strange that families adopt dogs but not a child.

I found two confusing answers as follows..

1: It is strange that dogs but not a child are adopted by families.
2: It is strange that dogs are adopted by families but not a child.

Which one is appropriate?

Answer 1

"It is strange that families adopt dogs but not a child." the OP's sentence.

The passive:

• It is strange that dogs but not a child are adopted by families.

Still "a child" vaguely referring to general plural meaning of "children" sounds odd here. I would recommend the following:

• It is strange that dogs but not children are adopted by families.