1. If a third party has submitted a petition before collector with regard to to eh public pathway through your land, then he has to produce documentary evidence to prove his claim.The collector will send notice to you or to the owner of the landed property as per revenue records seeking explanation and objection to the complaint made against you in this regard.
You can produce all the documentary evidence in your possession and also can say that the property is under your possession and enjoyment for more than 6 to 7 decades, hence you acquire title to the said proeprty even if it is considered as pathway, by adverse possession.
If ther collector is passing an order declaring the same as public pathway, you may file a lawsuit for declaration to declare the title of the said property to your name on the basis of the documentary evidences in your possession as well as operating law of adverse possession.
2. You see the above answer which explains this question too.
3. Since nobody had been using this pathway for plenty of decades, you need not suggest an alternate pathway to the collector's notice, instead you just record your objection in writing and proceed with the legal options subsequently.
4, Don't be frustrated by this complaint.
You have legal options to get justice.
Whether patta land or the land by a registered deed, the law of adverse possession is equally applicable to your situation, hence you may consult a local lawyer and proceed as suggested.