Multiple choice general knowledge history

Which one of the folllowing is a group of functions studied by by Ramanujan in 1920 ?

  1. approximation of value of pi

  2. bernoulli theorems

  3. relativity

  4. mock theta
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D Correct answer
Explanation

Ramanujan discovered and studied mock theta functions in 1920, the year of his death. These were revolutionary functions that didn't fit existing categories and puzzled mathematicians for decades. Approximation of pi and Bernoulli theorems were earlier works, and relativity is unrelated to Ramanujan's field.

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