Although he had fewer supporters among the governing class, but he was able to get the popular vote.

The most appropriate phrase to replace the phrase given in bold is “he was able”. It is to be noted that ’Although/Though’ is followed by ’yet’ and not ’but/and/or/else’. And in writing, many a times, ’yet’ is replaced by a ’comma’, which is the case here. Since option 1 is in the precise grammatical syntax, it becomes the most suitable answer choice.