Which correctly uses or omits commas?

My sister Cecelia is always much more cheerful than my other sisters.

My sister Cecelia, is always much more cheerful than my other sisters.

My sister, Cecelia, is always much more cheerful than my other sisters.

My sister, Cecelia is always much more cheerful than my other sisters

Question

Which correctly uses or omits commas? 



My sister Cecelia is always much more cheerful than my other sisters. 



My sister Cecelia, is always much more cheerful than my other sisters. 



My sister, Cecelia, is always much more cheerful than my other sisters. 



My sister, Cecelia is always much more cheerful than my other sisters

anonymous · Answer

My sister Cecelia, is always much more cheerful than my other sisters. so b