60. Match the following :

List – I ,	List – II
a. SecondaryIndex ,	i. Functional Dependency
b. Non-procedural Query Language ,	ii. B-Tree
c. Closure of set of Attributes ,	iii. Relational Algebraic Operation
d. Natural JOIN ,	iv. Domain Calculus

Codes :

a b c d

(A) i ii iv iii

(B) ii i iv iii

(C) i iii iv ii

(D) ii iv i iii

^{Answer D.}