Which of the following statements about Nepal is incorrect?

During the nineties, the Democrats of Nepal were successful in spreading their influence in many parts of Nepal. They believed in armed insurrection against the monarch and the ruling elite.

The correct answer is Option 2 - During the nineties, the Democrats of Nepal were successful in spreading their influence in many parts of Nepal. They believed in armed insurrection against the monarch and the ruling elite. 

Statements about Nepal given in the question:

Option 1- Nepal was a Hindu kingdom in the past and then a constitutional monarchy in the modern period for many years. (CORRECT)
Option 2- During the nineties, the Democrats of Nepal were successful in spreading their influence in many parts of Nepal. They believed in armed insurrection against the monarch and the ruling elite.  (INCORRECT)
Option 3- For some time, there was a triangular conflict among the monarchist forces, the democrats and the Maoists in Nepal concerning the poitics of the country. (CORRECT)
Option 4- In April 2006, there were massive, country-wide, pro-democracy protests in Nepal. In 2008, Nepal became a democratic republic after abolishing the monarchy. (CORRECT)

CORRECTION in Option 2- During the nineties, the MAOISTS, not democrats of Nepal were successful in spreading their influence in many parts of Nepal. They believed in armed insurrection against the monarch and the ruling elite. 

Nepal was a Hindu kingdom in the past and then a constitutional monarchy in the modern period for many years. Throughout this period, political parties and the common people of Nepal have wanted a more open and responsive system of government. But the king, with the help of the army, retained full control over the government and restricted the expansion of democracy in Nepal. The king accepted the demand for a new democratic constitution in 1990, in the wake of a strong pro-democracy movement. However, democratic governments had a short and troubled career. During the nineties, the Maoists of Nepal were successful in spreading their influence in many parts of Nepal. They believed in armed insurrection against the monarch and the ruling elite. This led to a violent conflict between the Maoist guerrillas and the armed forces of the king. For some time, there was a triangular conflict among the monarchist forces, the democrats and the Maoists. In 2002, the king abolished the parliament and dismissed the government, thus ending even the limited democracy that existed in Nepal.

In April 2006, there were massive, country-wide, pro-democracy protest. The struggling pro-democracy forces achieved their first major victory when the king was forced to restore the House of Representatives that had been dissolved in April 2002. The largely non-violent movement was led by the Seven Party Alliance (SPA), the Maoists and social activists. Nepal's transition to democracy is almost complete. Nepal has undergone a unique moment in its history because it formed a constituent assembly to draft the constitution for Nepal. Some sections in Nepal thought that a nominal monarchy was necessary for Nepal to retain its link with the past. The Maoist groups agreed to suspend armed struggle. They wanted the constitution to include the radical programmes of social and economic restructuring. All the parties in the SPA did not agree with this programme. The Maoists and some other political groups were also deeply suspicious of the Indian government and its role in the future of Nepal. In 2008, Nepal became a democratic republic after abolishing the monarchy. In 2015, it adopted a new constitution.