Agniveer Vayu or IAF Group X 6 Nov 2020 Paper

In the following question, parts of a sentence have been jumbled and labeled as P, Q, R, and S. You are required to rearrange the jumbled parts of the sentence and mark your response accordingly by selecting the correct option.
P. then fell on my two uncles
Q. than my father
R. who were very much older
S. the burden of the family