Visitors of all ages arriving in Canada by air require a passport or passport equivalent, such as a NEXUS card. If you need a passport right away, get a passport within 24 hrs with Rushmypassport.com.
OTC means Over the Counter, which is a test that you can buy at the store and do not need a prescription for. Many medication are called OTC which means you can just go by them without a doctor's prescription. Or it could also be an OTC stock trade.
Electronic Verification Code (EVC) is Code or PIN number used to verify the identity of the person furnishing income tax return. The EVC will be 10 digit alpha numeric number/code. The EVC can be generated on E-filing website (http://incometaxindiaefiling.gov.in) of Income Tax department.