In India at the occasion of marriages, the fire works used give green flame. Which one of the following radicals may be present

Options :
  1. Na
  2. K
  3. Ba
  4. Ca
Answer and Explanation :-

Answer: Option 3

Explanation:

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Is it not by learning to read the book of nature with the eyes of faith that we come to recognize the drop of divinity that resides in our own souls though hidden, master? In the end is this not faith to seek the light that takes us further, the light of Christ that brings that to which reason and knowledge alone can never raise itself? This is truth!
-Adriana Koulias Temple of the Grail