Choose the correct alternative from the following : - Assertion (A) : Mohammad-bin-Tughluq is called the 'wisest fool'. Reason (R) : He had wise plans but implemented them foolishly.
Choose the correct alternative from the following : - Assertion (A) : An iron ball floats on mercury but gets immersed in water. Reason (R) : The specific gravity of iron is more than that of mercury.
Choose the correct alternative from the following : - Assertion (A) : Glass tumbler breaks in winter when hot water is poured in it. Reason (R) : When hot water is poured, the outer surface of glass expands.
Choose the correct alternative from the following : - Assertion (A) : In the upper course, the main work of the river is erosion. Reason (R) : River flows swiftly in the upper course.