Thanks Amir for further clarification
Actually i haven't find it anywhere in the section, however it is given as a Hint for Tax Planning In Singhania's Book after Section 115 JB:-
"As a measure to reduce the impact of section 115JB on computation of tax incidence, expenditure on acquisition of patent rights or copyrights, preliminary expenses and expenditure on prospecting, etc., for certain minerals should be amortised for accounting purposes according to the provisions of sections 32, 35A, 35D and 35E."
Please let me know whether it is given specifically under any section.