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Solution


Q.

Assertion (A): If two lines are coincident, then we say that system of lines is consistent and it has a unique solution.

Reason (R): If two lines are parallel, then the pair has no solution and is called inconsistent pair of equations.
1 Both A and R are true, and R is the correct explanation of A.  
2 Both A and R are true, but R is not the correct explanation of A.  
3 ) A is true, but R is false.  
4 A is false, but R is true.  

Ans.

(4)

If two lines are coincident, then the pair of lines is consistent and it has infinitely many solutions.

Therefore, Assertion (A) is not true but Reason (R) is true.