Choice "C" is correct. A partnership may elect to have a tax year other than the generally required tax year if the deferral period for the tax year elected does not exceed three months.Choice "d" is incorrect. Generally, partnerships must adopt the same taxable year as the majority of their partners (usually December 31) unless a natural business year exception or the above exception applies.Choice "a" is incorrect. A valid business purpose reason for adoption of a tax year other than the generally required tax year may still apply if approved by IRS.Choice "b" is incorrect. No such form or filing requirement exists.