Allowability of revenue exp. can't be judged merely on basis of treatment given to it in books: HC

IT : Where assessee incurred certain expenditure towards research and development and in books of account treated one-third of expenditure as relating to assessment year 1992-93 and remaining two-third was written off in succeeding two financial years and further in assessment year 1992-93 claimed entire expenditure as deductible, assessee was entitled to claim entire expenditure as deduction in assessment year in question and it had to be allowed