Every year, 22 December is celebrated as National Mathematics Day. Which of the following statements is/are INCORRECT regarding the day?

1. The day was declared as National Mathematics Day to commemorate the birth anniversary of Mathematician Srinivasa Ramanujan by Prime Minister Manmohan Singh on 26 February 2012 at Madras University
b: In 1917, Ramanujan was elected to be a member of the London Mathematical Society
c: In 2015, the day's significance was enhanced by the opening of the Ramanujan Math Park in Andra Pradesh
d: The number 1729 is known as the Hardy-Ramanujan number

Select the correct answer using the code given below.

(a) 1 only
(b) 2 and 4 only
(c) 3 only
(d) 2 and 3 only