During Justice party rule in the Madras Presidency , who introduced Free Midday Meals Scheme at Thousand Light , Chennai ?
Periyar
Panagal Raja
Annamalai Chettiyar
Thiyagaraja Chettiyar
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Arrange the following fertilisers according to the decreasing order of their nitrogen contentI. Ammonium sulphate
II. Ammonium nitrate
III. Potassium nitrate
IV. Urea