Correct Answer: Only conclusion I follows

Solution : The possible Venn diagram, according to the given statements is as follows –

Let's analyse the conclusions –
Conclusion (I): Some therapists are dietitians – From the Venn diagram, it is evident that the two circles representing therapists and dietitians overlap and have a part of their area in common. So, this conclusion follows.
Conclusion (II): No dietitian is a physician – From the Venn diagram, it is evident that there is no direct relation between dietitians and physicians. Thus, no definite relation can be drawn. So, this conclusion does not follow.

From the above, the only conclusion I follows. Hence, the first option is correct.