Select the most appropriate option to fill in the blank.
The family heirloom was not only rare but was also _________.

Correct option is C

The correct option to fill in the blank is (c) priceless.
Explanation: "Priceless" refers to something so valuable that its worth cannot be determined. It suits the word "heirloom" perfectly. (Hindi: अमूल्य / बेशकीमती)
Example: This necklace is a priceless family treasure.
Other options and why they are wrong:
· (a) Productivity – Refers to output, not a descriptive trait for an object.
· (b) Profit – Financial gain; illogical with "heirloom".
· (d) Artist – A person, not an adjective or noun that fits the context.