Correct option is C
The correct option to fill in the blank is (c) sign away.
"Sign away" means to give up or relinquish a right or claim, especially by signing a document. (हक़ या अधिकार छोड़ देना)
Example: She signed away her inheritance to keep peace in the family.
Explain why other options are incorrect:
· (a) sign with: To sign something together with someone. (किसी के साथ हस्ताक्षर करना)
· (b) sign for: To sign on behalf of someone. (किसी के लिए हस्ताक्षर करना)
· (d) sign in: To register one’s presence. (प्रवेश के समय हस्ताक्षर करना)