Which of the following terms describes occurrence of more frequent road traffic accidents on weekends? Option A. 'Cyclic trends' is correct. Secular trends appear over very long time periods usually one or more decades. Seasonal trends are an annual feature. Cyclical trend indicates that it occurs regularly after a fixed periodicity. The time interval between a primary case and a secondary case is called Option A. 'serial interval' is correct. The serial interval, in the epidemiology of communicable (infectious) diseases, refers to the time between successive cases in a chain of transmission. Incubation period refers to the time between the entry of the causative organism in the host and the development of symptoms. Colour coding 'black' of biomedical waste is disposed off by Option D. ‘disposal in secured landfill’ is correct. ‘Black colour’ containers are to have discarded medicines and cytotoxic drugs, incineration ash and chemical used in production of biologicals, chemicals used in disinfection, etc. These can neither be incinerated nor autoclaved and hence are disposed off in landfills. Secondary prevention of carcinoma cervix includes which of the following? Option D. 'Pap smear testing' is correct. Secondary prevention entails “early diagnosis and treatment”. The purpose of pap smear testing is to promote early detection. Family planning, circumcision and personal hygiene are examples of primary prevention. Which of the following diseases has the shortest incubation period? Option B. 'Influenza' is correct. Incubation period is as follows: Measles: 10 days, Influenza: 18- 72 hrs, Small Pox: 12 days, Chicken Pox: 15 days. In ESI Act, 1948 the employers contribution is 4.75% of the Option A. 'total wages' is correct. The Central Government is empowered as per the ESI Act to decide the rate of employers contribution. They have fixed it at 4.75%. How many planes of communication have been described in a doctor-patient relationship? Option C. '3' is correct. The three planes of communication are on an emotional plane, cultural plane and intellectual plane. Chairman of ESI Corporation is Option A. 'Union Minister for Labour' is correct. The Central government in exercise of the powers under the ESI Act has appointed the Union Minister of Labour as Chairman. This is because the Act deals with social security for workers.