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Consider the two statements below one labeled as Assertion (A) and other as Reason (R). Examine these two statements carefully and decide if Assertion (A) and Reason (R) individually true and if so (R) is a correct explanation of (A) select your answer using the code below: 

Assertion (A): Magnesium imparts characteristic colour to the flame. 

Reason (R): Due to small size and high effective nuclear charge ionization enthalpy of magnesium is high. 

(1) Both A & R are true and R is a correct explanation of A. 

(2) Both A & R are true but R is not correct explanation of A. 

(3) A is true R is false. 

(4) A is false R is true.

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(4) A is false R is true.

Magnesium do not impart colour and its ionization enthalpy is high due to small size.

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