If gcd (a, b) is defined by the expression, d=a*p + b*q where d, p, q are positive integers and a, b is both not zero, then what is the expression called?

If gcd (a, b) is defined by the expression, d=a*p + b*q where d, p, q

1.	If gcd (a, b) is defined by the expression, d=ap + bq where d, p, q are positive integers and a, b is both not zero, then what is the expression called?
A.	Bezout's Identity
B.	Multiplicative Identity
C.	Sum of Product
D.	Product of Sum
Answer» B. Multiplicative Identity