question whether S. 17(1) of the Indian Income-tax Act, 1922, was applicable to the case of the first respondent is not free from doubt. Therefore the Income-tax Officer was not justified in thinking that on that question there can be no two opinions. It was not open to the Income-tax Officer to go into the true scope of the relevant provisions of the Act in a proceeding under S. 154 of the Income-tax Act, 1961. A mistake apparent on the record must be an obvious and patent mistake and not, something which can be established by a long drawn process of reasoning on points on which there may conceivably be two opinions. As seen earlier, the High Court of Bombay opined that the original assessments were in accordance with law though in our opinion the High Court was not justified in going into that question. In Satyanarayan Laxminarayan Hegde and ors. v. Millikarjun Bhavanappa Tirumale(1) this Court while Spelling out the scope of the power of a High Court under Art. 226 of the Constitution ruled that an error which has to be established by a long drawn process of reasoning on points where there may conceivably be two opinions cannot be said to be an error apparent on the face of the record. A decision on a debatable point of law is not a mistake apparent from the record - see Sidhramappa AndannappaManvi v. Commissioner- of Income-tax, Bombay (2). The power of the officers mentioned in S. 154 of the Income-tax Act, 1961 to correct "any mistake apparent from the record" is undoubtedly not more than that of the High Court to entertain a writ petition on the basis of an "error apparent on the face of the record". In this case it is not necessary for us to spell out the distinction between the expressions 66 error apparent on the face of the record" and "mistake apparent from the record". But suffice it to say that the Income tax Officer was wholly wrong in holding that there was a mistake apparent from the record of the assessments of the first respondent.”