S. 56 : Income from other sources-Purchase consideration for transferring immovable property-Late father in the year 1991 and 1992-Value as on date of agreement should only be compared with actual consideration for purpose of section 56(2)(vii)(b)-Unexplained investment-Difference between stamp value of subject property and actual purchase consideration is only deemed/notional income, same could not be brought with meaning of unexplained investment under section 69. [S.56(2((vii(b), 69]