Choose the incorrect statement.a. The World Mental Health Day is observed on 10th October every year.b. The theme of 2017 World Mental Health Day was 'Mental Health at the Workplace'.c. The World Health Day is celebrated on April 7th every year.d. The theme of 2017 World Health Day was 'Depression'.

• A. b
• B. d
• C. c
• D. None of the above