While drafting the provisions the legislature did not make any water tight rule for determination of nature of income arising from purchase and sale of shares to be assessed under the head of capital gains or business income. It has been left upon the wisdom of the assessee and facts and circumstances of the case. Under these circumstances, if assessee has chosen a particular course after deciding all the pros and cons of both the options available to it and if the choice has been exercised in a bonafide manner, the Board has advised as discussed above that the AO does not have liberty under the law to thrust his opinion upon the assessee, so long as the assessee follows his choice on consistent basis