Yes. The punctuation is correct and it is a complete sentence. Nice job!
False ,
The punctuated sentence will be :
His doctor at any rate , could not identify the problem.
Read without using your pencil or highlighter
The poet Ampleforth is the character who was surprisingly thrown in the cell with Winston, the main character.
The surprise isn't really that the poet was jailed, but that he ended up in the same cell as Winston, after all, he had been slipping forbiden words into his poem's "translations" before, a very punishable offense.
I think A is the answer
Hope this helps