Which is not a recent phenomenon in health insurance industry segment?

Hospital chains are allowed by IRDA to enter health insurance business
Tremendous growth of health insurance business is tapped by standalone companies
Standalone companies are specifically barred from covering rural masses
None of the above

The correct answer is: C. Standalone companies are specifically barred from covering rural masses.

Option A is correct because hospital chains are allowed by IRDA to enter health insurance business. This is a recent phenomenon as it was not allowed earlier.

Option B is correct because standalone companies have tapped into the tremendous growth of health insurance business. This is a recent phenomenon as standalone companies were not very successful in the past.

Option C is incorrect because standalone companies are not specifically barred from covering rural masses. In fact, many standalone companies have been successful in covering rural masses.

Option D is incorrect because all of the options are not recent phenomena.