Correct Answer: 29th June

Solution : The correct option is 29th June.

In India, National Statistics Day is celebrated on June 29th every year. This day is observed to commemorate the birth anniversary of Prof. P.C. Mahalanobis, an eminent statistician, and to recognise his invaluable contribution to the field of statistics and economic planning in India. Prof. Mahalanobis established the Indian Statistical Institute (ISI) in 1931 in Kolkata, which became a statistical research and training centre. The National Statistics Day celebration aims to create awareness and promote the importance of statistics in planning and development.