With reference to national emergency under Art 352 of the Indian constitution ,consider the following statement :

1. The 44 the constitutional amendment Act replaced the term ' armed rebellion ' with ' internal disturbance' as one of the ground for proclamation of National Emergency 

2.Prior to44 the amendment Act,the proclamation needed to be passed by only a simple majority.

3.42nd Constutional Amendment Act granted special power to Rajya Sabha to discontinue national emergency .

Which of the above statement is/are correct ?