Answer :

To determine the smallest numeral among the given options, follow these steps:

1. List the numerals for comparison:
- Option (A): 15673
- Option (B): 15700
- Option (C): 15198
- Option (D): 15623

2. Compare two numerals at a time to identify the smaller numeral:
- Compare 15673 and 15700. Between these two, 15673 is smaller.
- Compare 15673 (smaller from previous comparison) with 15198. Between these two, 15198 is smaller.
- Compare 15198 (smaller from previous comparison) with 15623. Between these two, 15198 is still smaller.

3. Conclude the smallest numeral after completing the comparisons:
- After comparing all the given numerals, the smallest numeral is 15198.

Thus, the smallest numeral among the given options is:
(C) 15198.