False ,
The punctuated sentence will be :
His doctor at any rate , could not identify the problem.
What’s the options? Can u ask more clearly
"Sentence 2- The car needed a new battery, and Jack was broke" is the sentence among the following choices given in the question that contains a subordinating conjunction. The correct option among all the options that are given in the question is the third option or option "C". I hope the answer helped you.