Question #1: 

propylpropane
isopropylpropane
propylcyclopropane
isopropylcyclopropane
both "a" and "c"


Question #2: 

trans-1-bromo-2-methylcyclopentane
cis-1-bromo-2-methylcyclopentane
trans-2-bromo-1-methylcyclopentane
cis-2-bromo-1-methylcyclopentane
trans-1-bromo-2-ethylcyclopentane


Question #3: 

3-bromo-1,1-dimethylcyclobutane
1-bromo-3,3-dimethylcyclobutane
4-bromo-2,2-dimethylcyclobutane
2-bromo-4,4-dimethylcyclobutane
both "a" and "c"


Question #4: 

trans-4-ethyl-1-methylcyclohexane
trans-1-ethyl-4-methylcyclohexane
cis-1-ethyl-4-methylcyclohexane
cis-4-ethyl-1-methylcyclohexane
cis-1-ethyl-4-methylhexane


Question #5: 

3,3-dipropylcycloheptane
3,3-diisopropylcycloheptane
1,1-dipropylcycloheptane
1,1-diisopropylcycloheptane
dipropylcycloheptane


Question #6: 

4,4-difluoro-1-methylcyclooctane
1,1-difluoro-4-methylcyclooctane
7,7-difluoro-2-methylcyclooctane
3,3-difluoro-7-methylcyclooctane
both "a" and "c"


Question #7:

1-chloro-1,3-dimethylcyclobutane
3-chloro-1,3-dimethylcyclobutane
2-chloro-2,4-dimethylcyclobutane
4-chloro-2,4-dimethylcyclobutane
both "a" and "c"


Question #8: 

4-cyclopentylnonane
5-cyclopentyloctane
4-cyclopentyloctane
1-cyclopentyl-1-propylpentane
both "a" and "c"


Question #9: 

cis-3-bromo-6-ethylcyclohexane
trans-3-bromo-6-ethylcyclohexane
cis-1-bromo-4-ethylcyclohexane
trans-1-bromo-4-ethylcyclohexane
both "a" and "c"


Question #10: 

3-cyclobutyl-5,5-dipropylnonane
3-cyclobutyl-5,5-diisopropylnonane
5-butyl-3-cyclobutyl-5-propyloctane
5-butyl-3-cyclobutyl-5-isopropyloctane
4-butyl-6-cyclobutyl-4-propyloctane