PCA (Prometheus Certified Associate) sample exam question with answer 218

Question:
Which query below will give the 99% quantile of the metric http_requests_total?

1. histogram_quantile(0.99, http_requests_total_bucket)
2. http_requests_total(quantile=”0.99”}
3. quantile(http_requests_total, 0.99)
4. http_requests_total < 99%

Answer:
A - is the correct answer