Section 80D exists to encourage people to insure themselves and their families, but the legislature balanced that incentive against revenue concerns by attaching limits, so it is worth tracing how those limits work.
The layered cap structure built into Section 80D is best captured by the option that acknowledges both a benefit and its conditions.
\[ \boxed{\text{Deduction is allowed subject to prescribed limits and conditions}} \]Since the other three options each make an extreme claim, either unlimited, exclusive to one group, or entirely denied, checking them against the section's actual design quickly narrows the field.
Eliminating the extreme positions leaves the conditional, capped deduction as the accurate description.
Hence, the correct answer is Deduction is allowed subject to prescribed limits and conditions.
Match List-I with List-II: 