Question: Fill in the blanks with the most appropriate option that follows:
In many cases in physics, one has to deal simultaneously with collective and single-particle excitations of the system. The collective excitations are usually bosonic in nature while the single-particle excitations are often fermionic. One is therefore led to consider a system which includes bosons and fermions. Hence, ______________
Which of the following options is most likely to follow the paragraph given above?
The crux of the paragraph is explained in the second last line - “One is therefore...includes bosons and fermions”. Hence, the correct answer must take both aspects into consideration. This points to option 2.
Option 1 is ruled out as it only focuses on “bosonic particles”.
Options 3 and 5 contradict what the paragraph conveys.
Option 4 simply goes on to repeat what has already been stated in the passage.
Hence, the correct answer is option 2.