Depends on where you live but generally speaking it is either June or July
Your closes answer would be a.10
It is b, i learned this last year hope this helps
Answer:
IUPAC Rules for Alkane Nomenclature
Find and name the longest continuous carbon chain.
Identify and name groups attached to this chain.
Number the chain consecutively, starting at the end nearest a substituent group.
Designate the location of each substituent group by an appropriate number and name.
Explanation: