The area under the v-t graph which represents a physical quantity has the unit

Correct option is B

​The correct answer is (b) M.

The area under a velocity-time ($v-t$) graph represents the displacement of the object, which is measured in meters ($m$).

Explanation:

• The velocity ($v$) is measured in meters per second (ms−1ms^{-1}ms−1).
• The time ($t$) is measured in seconds ($s$).
• The area under the $v-t$ graph is v×t=(ms−1)×(s)=mv \times t = (ms^{-1}) \times (s) = mv×t=(ms−1)×(s)=m, which is the unit of displacement.