Under section 121 of the Income-tax Act, 2025, which of the following losses cannot be carried forward…

Section 121 of the Income-tax Act, 2025 bars the carry forward and set off, under sections 111(1), 112(1), 113(2), 114(2) and 115(2), of any loss not determined in pursuance of a return filed under section 263(1), which requires the return to be furnished on or before the due date. Those sections cover capital gains losses, business losses, speculation and specified business losses, and losses from owning and maintaining race horses, so "All of the given options are correct". Loss under the head Income from house property and unabsorbed depreciation are not covered by this bar. This corresponds to section 80 of the repealed Income-tax Act, 1961.