Which of the following state was formed in the year 1987?

Both 1 and 2

Arunachal Pradesh and Mizoram attained statehood in 1987

Tripura, Manipur and Khasi Hills of Meghalaya were erstwhile Princely States which merged with India after Independence. The entire region of North-East has undergone considerable political reorganisation. Nagaland State was created in 1963; Manipur, Tripura and Meghalaya in 1972 while Mizoram and Arunachal Pradesh became separate States only in 1987.