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ব্যাখ্যা ও সঠিক সমাধান
উত্তর:
Contingent contract
"A contingent contract" is a contract to do or not to do something, if some event, collateral to such contract, does or does not happen.....
Contingent contract to do or not to do anything if an uncertain future event happens can not be enforced by law unless and until that event has happened.