Premise — All scientists working in America are talented; some of these scientists are Indian.\nConclusions —\nI. None of the Indian scientists is talented.\nII. Some talented Indian scientists have migrated (are in America).\nIII. All talented scientists are in America.\nIV. Some Indian scientists are talented.\nQuestion — Which conclusion(s) follow(s)?

Introduction / Context:
We have a two-part premise: (1) every scientist (working) in America is talented; (2) some of these America-based scientists are Indian. We must deduce which conclusions are compelled.

Given Data / Assumptions:

• (All scientists in America) → (Talented).
• There exists at least one scientist who is both in America and Indian.
• No claims about all talented scientists or all Indian scientists globally are made beyond this intersection.

Concept / Approach:
From existence of Indian scientists in America, and “in America → talented,” it follows that some Indian scientists are talented (IV). Moreover, those talented Indian scientists are (by premise) in America, i.e., “have migrated/are working there,” which supports II. Claims negating talent for Indian scientists (I) or universalizing talent-location (III) are not warranted.

Step-by-Step Solution:

Verification / Alternative check:
Construct a model: 10 talented scientists worldwide, 3 in America (all talented), 2 of those are Indian. II and IV hold; I and III fail. The premises remain satisfied.

Why Other Options Are Wrong:

Common Pitfalls:
Reversing implications or assuming all talent resides in one country without support.

Final Answer:
Conclusion II and IV follows