do i know my india

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Across
  1. 2. father of nuclear program
  2. 5. father of the nation
  3. 6. largest single piece architecture
Down
  1. 1. master blaster in cricket
  2. 3. former president and nuclear scientist
  3. 4. this temple is conceived as a 'rath' or chariot
  4. 7. Maratha king who fought with the Mughals to protect his people