The following question consists of an incomplete sentence or a sentence split into four parts. All four parts are jumbled up and are named P, Q, R, and S. These four parts are not given in their proper order. Arrange the jumbled parts of the sentence and find out which of the four combinations from the given options will correctly complete the sentence.

Japan's _________________in a press release

P: Air Self-Defense Force

Q: also scrambled jets after

R:  the Chinese and Russian warplanes flew into the Sea

S:  of Japan, Tokyo's defence ministry said