Step 1: Understanding 'Non-Congressism'.
Ram Manohar Lohia, a prominent socialist leader, introduced the concept of "non-congressism" as a strategy to oppose the dominance of the Congress Party in Indian politics. He believed in creating a broad-based opposition alliance that could challenge the Congress Party's control.
Step 2: Analysis of options.
- (A) V.V Giri: Incorrect. V.V. Giri was an Indian politician who served as the President of India, but he was not the one who proposed the strategy of "non-congressism."
- (B) V.P Singh: Incorrect. V.P. Singh was a significant political leader, but he did not coin the "non-congressism" strategy.
- (C) Giani Zail Singh: Incorrect. Giani Zail Singh was a former President of India, but he was not associated with the "non-congressism" movement.
- (D) Ram Manohar Lohia: Correct. Ram Manohar Lohia is the correct answer, as he was the socialist leader who articulated the "non-congressism" strategy.
Step 3: Conclusion.
The correct leader who gave the strategy of "non-congressism" was Ram Manohar Lohia.
Final Answer:} Ram Manohar Lohia.