On a reading of section 18A and sub-section (4) of section 23 together, it is clear that out of the four portions into which the sample has been divided one portion should be sent to the person, if any, whose name and address and other particulars have been disclosed under section 18A; in re: R. Dayalan, 1978 Cri LJ 1852: (1979) 1 FAC 29.