`lambda x + 2y + 2z = 5, 2lambda x + 3y + 5z = 8, 4x + lambda y + 6z = 10` for the system of equation check the correct option.
A. no solution when `lamda=8`
B. no solution when `lamda=2`
C. a unique solution when `lamda=-8`
D. infinitley many solutions when `lamda=2`
