How we write alkane to Carboxylic acids when n=1,n=3?

The IUPAC name of a carboxylic acid is derived from that of the longest carbon chain that contains the carboxyl group by dropping the final -e from the name of the parent alkane and adding the suffix -oic followed by the word “acid.” The chain is numbered beginning with the carbon of the carboxyl group.

Ithink the answer is 56.

Yes i think so not 100 percent sure though