Is a lump sum beneficiary annuity distribution considered a RMD?

If I take the lump sum option on an inherited annuity, do I check "YES" to Turbo's question...."Is this a RMD"?  I'm required to have all the money out of the annuity no later than 5 yrs following my mother's death. I know what the taxable portion is.....I just don't know if this is considered a RMD.