Answer:
The memorising of names of British kings in their chronological order.
This is the best example of fluid intelligence
Explanation:
Raymond cattell, the renowned psychologist published a theory on general intelligence in the year 1971 in which he divided the intelligence of human in two divisions. One division is the fluid intelligence and the other is the crystallized intelligence.
The ability to learn and memorize, to comprehend and to solve problems related to reasoning is considered as fluid intelligence. So in the above mentioned example the ability to memorize the chronological order of British emperors fall under this intelligence.