Rearrange the parts of the sentence in correct order.
Although no convincing
P-arguments were made against
Q-was commotion in the House
R-the amendment, there

* The initial clause "Although no convincing" must be completed by a noun phrase. P provides "arguments were made against".
The preposition "against" in P needs an object, which is provided by "the amendment" in R.

R ends with "there", which introduces an existential clause completed by Q ("was commotion in the House").
Therefore, the logical order is PRQ.