The question requires evaluating two statements, Assertion (A) and Reason (R), concerning the glacial landforms known as drumlins and roches moutonnees.

Evaluation of Assertion (A)

Assertion (A) states that drumlins exhibit features opposite to those of roches moutonnees.

• Drumlins are depositional landforms created by glacial ice. They are typically streamlined, with a blunt, steep end facing the direction of ice flow (the stoss side) and a tapered, gentler end pointing away from the ice flow (the lee side).
• Roches Moutonnees are erosional landforms carved by glacial ice. They are characterized by a smooth, gently sloping stoss side (shaped by abrasion) and a steep, jagged lee side (formed by plucking).

A comparison reveals that the formation processes (deposition vs. erosion) and the typical shapes of the stoss and lee sides are indeed contrasting. Therefore, Assertion (A) is established as correct.

Evaluation of Reason (R)

Reason (R) states: "The stoss side is steep and the lee side is roughened."

Within the framework of this question and its provided answer, this statement is considered factually correct. It highlights specific morphological attributes relevant to glacial features. For example, the stoss end of a drumlin can be steep, and the lee side of a roche moutonnée is characteristically steep and roughened due to glacial plucking.

Analysis of the Relationship Between (A) and (R)

Assertion (A) correctly identifies the opposing characteristics between drumlins and roches moutonnees. Reason (R) presents a descriptive statement about the steepness of the stoss side and the roughness of the lee side.

While both (A) and (R) are deemed correct, Reason (R) does not explain the fundamental reason for the opposition mentioned in (A). The opposition stems from the distinct geological processes involved – deposition for drumlins and erosion for roches moutonnees – and their resultant shaping mechanisms. Reason (R) describes certain features but does not articulate the underlying cause of the contrasting morphology. Consequently, (R) is not the correct explanation of (A).

Final Answer Determination

Based on the analysis, both Assertion (A) and Reason (R) are correct, but Reason (R) does not serve as the correct explanation for Assertion (A). This aligns with Option B.