Concept:
Agricultural "revolutions" in India refer to periods of significant increase in the production of specific commodities through the application of technology and policy changes. Each color is symbolically linked to a product.
Step 1: Defining the Grey Revolution.
The Grey Revolution is associated with the massive increase in the production and consumption of chemical fertilizers. It is closely linked to the after-effects of the Green Revolution, as higher crop yields required higher inputs of fertilizers.
Grey Revolution rightarrow Fertilizers
Step 2: Identifying other color-coded revolutions.
To understand why Option (A) is correct, let's contrast it with others:
• Blue Revolution: Fish/Aquaculture.
• Yellow Revolution: Oilseeds.
• Pink Revolution: Onions Prawns Pharmaceuticals.
• Black Revolution: Petroleum.
• Red Revolution: Meat Tomatoes.
Step 3: Context of Spice and Tea.
Increased spice production is often associated with the Badami Revolution. Tea and coffee production are generally considered part of the plantation sector but do not have a specific widespread "color" name like the Grey Revolution.
Final Answer: Option A