What is the name of the deadly volcano in Indonesia that erupted again in May 2016, causing significant damage and loss of life?

Introduction / Context:
This question focuses on world geography and natural disasters. Indonesia lies in the Pacific Ring of Fire and experiences frequent volcanic eruptions. One of its dangerous volcanoes, Mount Sinabung, erupted multiple times in the last decade, including a deadly eruption in May 2016. Knowing the names and locations of such volcanoes is a common requirement in general knowledge exams.

Given Data / Assumptions:

• The eruption in question occurred in May 2016.
• It was described as deadly and located in Indonesia.
• Options list Mount Sinabung, Mount Merapi, Mount Rinjani, Mount Agung and Krakatau.
• We assume familiarity with major Indonesian volcano names.

Concept / Approach:
The approach is to recall which volcano had a notable eruption in 2016 that was widely covered in news as Mount Sinabung. Merapi, Rinjani, Agung and Krakatau have also erupted in various years, but the specific deadly eruption around May 2016 is associated with Sinabung on the island of Sumatra. Remembering the time line helps to separate this event from other eruptions.

Step-by-Step Solution:
Step 1: Identify that the question refers to Indonesia, which has many active volcanoes. Step 2: Recall that Mount Sinabung reawakened after a long dormant period and has been erupting intermittently since around 2010. Step 3: A significant eruption in May 2016 from Mount Sinabung caused casualties and destruction, making international headlines. Step 4: Although Mount Merapi, Rinjani, Agung and Krakatau are also famous, their major recent eruptions occurred in different years. Step 5: Therefore, the volcano that erupted again in May 2016 is Mount Sinabung, corresponding to option A.

Verification / Alternative check:
Checking summaries of global natural disasters by year shows that 2016 lists a fatal eruption of Mount Sinabung in Indonesia, while Merapi major eruptions are noted in 2010 and other years, and Agung in later years like 2017. This date based cross check helps confirm that Sinabung is the correct match for the May 2016 eruption mentioned in the question.

Why Other Options Are Wrong:
Option B (Mount Merapi) is wrong because its most deadly recent eruption occurred in 2010, not in May 2016.
Option C (Mount Rinjani) is incorrect; although active, its notable eruptions do not match the specific 2016 event described here.
Option D (Mount Agung) is wrong; its modern eruptions that gained attention occurred in later years.
Option E (Krakatau) is also incorrect; while historically famous for its massive 1883 eruption and later activity, it is not the volcano referenced by the May 2016 event.

Common Pitfalls:
Candidates may confuse names of Indonesian volcanoes because many questions mention Merapi or Krakatau in other contexts. Another pitfall is to ignore the year mentioned and rely only on familiarity, which can lead to wrong choices. Always pay attention to the time frame in disaster related questions, as it often distinguishes one event from several similar ones.

Final Answer:
The deadly Indonesian volcano that erupted again in May 2016 is Mount Sinabung.