Step 1: Understanding the context.
The sentence talks about how India’s projection as a market for nuclear reactors has transformed its image. The focus is on the dramatic change in India’s global perception due to this development. We need to find a phrase that complements this transformation and highlights the positive impact on India's image.
Step 2: Analyzing the options.
(A) considered as a global leader: This is the most appropriate choice, as it implies that India’s image has been elevated to a position of global leadership due to the projections in the nuclear reactor market.
(B) left unrealistically evil: This is incorrect as it implies a negative transformation of India's image, which contradicts the tone of the sentence.
(C) crowned as king: While this might seem positive, it is too regal and metaphorical, making it less suitable in the context of international relations and nuclear energy projections.
(D) marginalised as puerile: This is incorrect, as it suggests a negative perception of India, portraying it as immature or childish, which doesn’t fit the context.
(E) detained for life: This is completely inappropriate, as it suggests a form of punishment or imprisonment, which doesn’t align with the sentence's context.
Step 3: Conclusion.
The correct choice is (A) considered as a global leader, as it appropriately conveys the positive transformation of India’s image in the global arena.