Section 56(2)(x) was inserted to stop people from disguising unaccounted money as "gifts," so it helps to think about how the provision closes that loophole.
The provision's entire purpose, catching disguised money transfers, only makes sense if the excess sum is taxed under the residuary head.
\[ \boxed{\text{It is taxable under the head 'Income from Other Sources'.}} \]Looking at what each option implies about the legislature's intent behind Section 56(2)(x) helps identify the one that is consistent with an anti-abuse gift-taxation rule.
Only the option that taxes the sum under the residuary head aligns with the provision's anti-abuse design.
Hence, the correct answer is It is taxable under the head 'Income from Other Sources'.
Match List-I with List-II: 