Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R): Assertion (A): Equation 5x-7y+z=11, 6x-8y-z=15 and 3x+2y-6z=7, then the system is consistent and has infinitely many solutions. Reasons (R): If D=0 then the 3 linear equations is consistent and has infinitely many solutions if D1 = D2 = D3=0. In the light of the above Statements, choose the correct answer from the options given below :