I searched in the internet but most of them said that there are 38 transition metals. But our text book says that group 12 or the group of zinc CAN'T BE COUNTED as transition metals. Which already puts the number to 37? Moreover Scandium, La and Ac also can't be counted as transition metals. That puts the number to 34. Yttrium being in the same group as Sc should also be cancelled as transition metals making the number 33. These are all my thoughts and haven't been varied by any reliable sources. And also it's based on our text book. So I would like to know what is wrong with these thoughts.
Note: The book considers thorium a d block element. Thus according to the book the number of d block elements is 41.