With reference to the life and contributions of Pingali Venkaiah, consider the following statements:

  1. He was born in Krishna district and conducted agricultural research to improve food grain production.
  2. He designed the Tricolour flag that was later adopted as the national flag of India with minor modifications.
  3. He earned the title of 'Diamond Venkaiah'.

1
1 and 2 only
2
2 and 3 only
3
1, 2, and 3
4
1 and 3 only

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