Ojos del Salado in Chile. It's height is 6887m. It last erupted 10,000 years ago.
No
mauna loa is the biggest volcano, but mount etna is the highest active volcano.
If talking about the highest most active volcano, it would be the Ojos del Salado at the Chile/Argentina border line, reaching a height of 6892m high
Mauna Kea, the dormant volcano in the Hawaiian Islands which is, measuring from its base underwater to its tip, the tallest mountain in the world