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Assertion (A): The rate of flow of metal through sprue is NOT a function of the cross – sectional area of sprue runner and gate

Reason (R): If respective cross – sectional areas of sprue runner and gate are in the ratio of 1: 2: 2, the system is known as unpressurised gating system

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is NOT the correct explanation of A

(c) A is true but R is false

(d) A is false but R is true

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