A physical quantity is represented by X = [ M^aL^bT^-c] . If the % error in the measurement of M, L and T are alpha % , beta % and gama % respectively , then maximum % error in measurement of X should be ( given that alpha , beta and gama are very small ) 1) (alpha*a -beta*b+ gama *c) % 2) ( alpha* a+ beta*b + gama*c ) % 3) ( alpha*a - beta* b- gama*c ) % 4) (alpha*a+beta*b - gama*c ) %