Four sentences are given. You need to find if they are grammatically correct or incorrect and mark the answer accordingly.

P. Deforestation ought to be a primary concern of any right-thinking government.

Q. They should instead respect the withdrawal agreement, and be flexible in the talks as well as on deadlines.

R. Some analysts believe that an escalation of some kind seems inevitable.

S. Even though the weather was horrible, but they still went outside.