Which of the following sentences are true for the rivers of North America?

a. Mississippi, the largest river of the continent, drains into the Gulf of Mexico.
b. Columbia River forms the Grand Canyon.
c. St Lawrence river joins the five Great Lakes.
d. River Mackenzie is a west-flowing river in Canada.

Choose the right answer from the following:

1. a. and c. are correct.
2. a. and b. are correct.
3. c. and d. are correct.
4. b. and c. are correct.

It is a narrow stretch of water body that separates Asia and North America.

1. the Bering Strait
2. the Bering Sea
3. the Panama Canal
4. the Gulf of Alaska

Two statements are given in the question below as Assertion (A) and Reason (R). Read the statement and choose the appropriate option:

Assertion (A): Lumbering is the most common occupation in Canada.

Reason (R): Coniferous forests occupy 60 per cent of the total land area of the country.

1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true and (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. (A) is false and (R) is true.

Two statements are given in the question below as Assertion (A) and Reason (R). Read the statement and choose the appropriate option:

Assertion (A): Large number of lakes occupy the basins lying to the south of Hudson Bay.

Reason (R): Glaciers from the mountains melted and occupied the basins.

1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true and (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. (A) is false and (R) is true.