The passage starts with the sentence, ‘There were shots as I ran’ which clearly shows that firing was going on. To save oneself from firing, one ducks down which indicates that S will follow S1. The man was running towards the river, so Q will be the next sentence that mentions river. The man plunged in the river which is suggested by ‘I stayed until’. So, P will follow next. After staying in the water, the man would long to breathe and he would come up. So, R follows the next. SQPR is the correct sequence. Hence, (a) is the correct option.