S. 50B : Capital gains – Slump sale – Assets transferred to Subsidiary- Allotment of Shares — Scheme approved by High Court — Not slump sale for purposes of capital gains Tax — The transfer, pursuant to approval of a scheme of arrangement, was not a contractual transfer, but a statutorily approved transfer and could not be brought within the definition of the word sale -Claim which was not raised in return or revised return – Appellate authorities must consider the claim if facts are on record – No estoppel in taxation law – [ S.2(42C) 45 , 54EC , Companies Act , S. 393, 394, Transfer of property Act, 1882 S.118 , Sale of Goods Act , 1930 , S.2(10) ]