12. The use of the word shall' in proviso to Section 202(2) is prima facie indicative of mandatory character of the provision contained therein, but a close and critical analysis thereof along with other provisions contained in Chapter XV and Sections 226 and 227 and Section 465 would clearly show that non examination on oath of any or some of the witnesses cited by the complainant is, by itself, not sufficient to denude the concerned Magistrate of the jurisdiction to pass an order for taking cognizance and issue of process provided he is satisfied that prima facie case is made out for doing so. Here it is significant to note that the word all' appearing in proviso to Section 202(2) is qualified by the word `his'. This implies that the complainant is not bound to examine all the witnesses named in the complaint or whose names are disclosed in response to the order passed by the Magistrate. In other words, only those witnesses are required to be examined whom the complainant considers material to make out a prima facie case for issue of process. The choice being of the complainant, he may choose not to examine other witnesses. Consequence of such non-examination is to be considered at the trial and not at the stage of issuing process when the Magistrate is not required to enter into detailed discussions on the merits or demerits of the case, that is to say whether or not the allegations contained in the complaint, if proved, would ultimately end in conviction of the accused. He is only to see whether there exists sufficient ground for proceeding against the accused.”