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1.
Assertion (A):The SI system of units is the suitable system for measurements.
Reason (R):The SI unit of temperature is kelvin.
 
2.
Assertion (A):Electric current, amount of substance, luminous intensity are the fundamental physical quantities.
Reason (R):They are independent of each other.
 
3.
Assertion (A):Radian is the unit of solid angle.
Reason (R):One radian is the angle subtended at the centre of a circle by an arc of length equal to its radius.