Correct option is C
Option (c) is the correct meaning of the given idiom.
Idiom: "As thin as a stick"
Meaning: To be very, very thin — almost underweight or frail in appearance. (हड्डी जैसी पतली)
Example: After her illness, she looked as thin as a stick.
Other related idioms and their meanings:
As fit as a fiddle – In good health
As pale as a ghost – Very pale
As light as a feather – Extremely lightweight
Skin and bones – Extremely thin