Whether sweeping service to the Govt is eligible for GST exemption?

In re NIS Management Ltd (GST AAR West Bengal) Whether sweeping service to the Govt is eligible for exemption under Sl No. 3 or 3A of Notification No. 1136-FT dated 28-6-17 Sweeping Service that the Applicant supplies to the Housing Directorate of the Government of West Bengal, cannot be classified as an activity in relation to any function entrusted to a Panchayat under Article 243G of the Constitution or in relation to any function entrusted to a Municipality under Article 243W of the Constitution. The exemption under Sl No. 3 or 3A, as the case may be, of Notification No 12/2017-CT (Rate) ...