Which one of the following (Lake–Country) is NOT correctly matched?

1. A

   Baikal – Russia

   Option (a) pairs Lake Baikal with Russia. This is correctly matched because Lake Baikal is indeed located in Russia and is recognized as the deepest freshwater lake in the world.

2. B

   Michigan – United States of America

   Option (b) links Lake Michigan to the United States of America. This pair is correctly matched as Michigan is one of the five Great Lakes of North America entirely within the US borders.

3. C

   Onega – Canada

   Option (c) associates Lake Onega with Canada. This is incorrectly matched because Lake Onega is actually situated in the northwestern part of Russia, making it the second-largest lake in Europe after Lake Ladoga, and thus serves as the correct answer for the mismatched pair.

4. D

   Maracaibo – Venezuela

   Option (d) connects Lake Maracaibo to Venezuela. This is a correct match since Lake Maracaibo is a large brackish bay in Venezuela connected to the Gulf of Venezuela.

Summary. Official key is (c) because Lake Onega is located in Russia, not Canada. Lake Baikal is correctly placed in Russia, Lake Michigan is in the United States, and Lake Maracaibo is in Venezuela. Candidates often confuse European lakes like Onega with North American counterparts due to similar naming conventions. Carefully verifying geographical locations of lesser-known international lakes helps avoid such mistakes in the examination.