Let start = 4 & end = 4 ; therefore m =4 , we know 4 is not a Prime hence goes to else part. Now, j becomes -4 & k becomes 4. & loop stops. If we check options now, option b) is eliminated while a) & b) come as true.
Lets now take start =4 & end =5. Therefore m = 4, same happens as above & values in j=-4 &. k=4.
Now m++, & m becomes 5, for m=5, we will get True as m is a prime, so if() part works. Now, i becomes 5 & k becomes -1. Now, we check options, only option c) satisfies.
To verify once again, we can go from 4 to 6 & check so on. We can take start & end as any random numbers & it still satisfies. Hence we can eliminated d) i.e. it is independent of the values of start & end.