9. Further, sub-sec. (1) of Sec. 3 of the Act confers power on the State Government and a District Magistrate or a Commissioner of Police under the direction of the State Government to detain a person on being satisfied that it is necessary to do so with a view to preventing him from acting in any manner prejudicial to the maintenance of "public order". The explanation attached to Sub-sec. (4) of Sec. 3 reproduced above in the foregoing para contemplates that "public order" shall be deemed to have been affected adversely or shall be deemed likely to be affected adversely inter alia if any of the activities of any person referred to in sub-sec. (4) directly or indirectly, are causing or is likely to cause any harm, danger or alarm or feeling of insecurity among the general public or any section thereof or a grave or widespread danger to life, property or public health. Sub-sec. (4) of Sec. 3 also provides that for the purpose of Sec. 3, a person shall be deemed to be 'acting in any manner prejudicial to the maintenance of public order' when such person is a "dangerous person" and engaged in activities which affect adversely or are likely to affect adversely the maintenance of public order. It, therefore, becomes necessary to determine whether besides the person being a "dangerous person" his alleged activities fall within the ambit of the expression 'public order'. A distinction has to be drawn between law and order