Match List - I with List - II and choose the correct answer

To solve this matching problem, let us look at the standard matching options and identify the correct relationships between the items in List I and List II.
Based on the correct option provided, the matching pairs are as follows:

1. Item a matches with (iv):
This indicates a specific scientific relationship, concept, or formula corresponding to pair a - (iv).

2. Item b matches with (iii):
This indicates that the second concept in List I corresponds to the third description in List II, yielding the pair b - (iii).

3. Item c matches with (i):
This indicates that the third concept in List I corresponds to the first description in List II, yielding the pair c - (i).

4. Item d matches with (ii):
This indicates that the fourth concept in List I corresponds to the second description in List II, yielding the pair d - (ii).

Combining these matching pairs, we get the complete correct combination: a - (iv) b - (iii) c - (i) d - (ii).