S. 72 : Carry forward and set off of business losses – Carry forward and set off of business losses against capital gains – Entitled to set off of carried forward business loss against capital gain arising on sale of business asset used for the purpose of business- Business Loss can be carried forward and set off against income attributable to business though assessed under different head – Interpretation of taxing statutes — Expressions in provision. [ S. 28 (i) , 45 ,50, 71 , 72 (1)(i).]