Defamation case against relative of my borrower

Some body (A) had borrowed as friendly loan from us against ornaments as security for loan and subsequently repaid the amount and taken back gold ornaments, now one of her relative (B) has filed a Chapter case against me in police station claiming that her ornaments have not been returned. Since that party (B) is not directly involved in the transaction which took place between me and her relative (A). The person who have borrowed money from us (A) has given undertaking in writing that all the ornaments she has got back, however one of her relative (B) is claiming that she has not got her ornaments back, though she is not any involved in the transaction between me and her relative (A) and filed Chapter case in police station and the concerned police station compelled us to go in the court and take Bail in that case. Questions: 1. Is that action of the police correct to call us and take us in the Court and ask us to take Bail in that case, though the police staff says that complainant does not have any proof against us that she has entered into any transaction with me or any other proof against us. 2. Whether we are liable to give Bail application in the court in such case though the police know that the complainant does not have any proof against me 3. Can we file defamation case against the complainant for filing false complaint against me and causing dis-reputation to me. 4. Can we say that action of the police to call us and take our explanation in such a false compliant when they agree and know that the complainant does not have and proof against me to file such compliant. 5. What is the legal remedy with me to challenge that false complaint which causes mental torture, dis-reputation and financial loss of facing such false complaint..