Will a mere complaint attract defamation

Just because a criminal complaint was not turned into an FIR, would not per se amount to defamation, only after the necessary trial if the complaint comes out to be false after trial - does normally one get to file for malicious proseuction + defamation. However you can try filing a defamation case, as a complaint is a public document and may lead to your reputation falling in the estimation of the right thinking members of the society. 

Place where complaint was made for that is where 'publication' took place. Infact I believe it can even be made in court having jurisdiction of one's residence, because a complaint would have made persons in his locality 

Any such act, if otherwise the words used by A is defamatory, it will amount to Defamation under section 499 of IPC. Relevant judgement for such event may be Dr. J. Sudarshan v. R. Sankaran, 1992 Cr.L.J. 2427

You can file private complaint in court of MM of your area as jurisdiction in criminal trial depends on complainant's residence. Alternatively, you can file private complaint in area where such FIR was lodged, being jurisdiction on the basis of cause of action.

Police complaint will result nothing in such cases. Only private complaint in court of MM will work.

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If FIR is registered in PS on criminal defamation.what will be the result if Chargesheet is in my favour.

Rgds,

Raj

if you file for defamation u are within ur rights

However sometimes it is better to let dead remain buried

look at time and money court cases take , further it will spoil ur reputation as aperson who keeps filing needless cases