Step 1: Understanding the Concept:
This question asks to identify the author of a given quote, which is from a significant speech.
Step 2: Detailed Explanation:
This quotation is a paraphrase of the pledge made by Dr. Zakir Hussain in his presidential acceptance speech, which is presented in the text "Bharat is My Home". Upon being elected as the President of India, he delivered a speech where he pledged his allegiance to the Constitution of India and his service to the nation's people, emphasizing the country's rich diversity and inclusive values. The sentiment of loyalty irrespective of religion or language is a key part of his address.
Step 3: Final Answer:
The quote is from the speech by Dr. Zakir Hussain. Therefore, option (A) is the correct answer.