Assertion:. River valleys are among the most densely populated areas of the world. Reasoning: Water is the most important factor for life.

Both Assertion (A) and reasoning (R) are correct and R is the correct explanation of A. Both Assertion (A) and reasoning (R) are correct and but R is not the correct explanation of A. Assertion (A) is true but Reasoning (R) is not correct. Assertion (A) is not true but Reasoning (R) is correct.

Both Assertion (A) and reasoning (R) are correct and R is the correct explanation of A.

Water is the most important factor for life. So, people prefer to live in areas where fresh water is easily available. Water is used for drinking, bathing and cooking