Which of the following statements are correct about the ethnic conflict in Sri Lanka?

(A) Sinhala nationalists were hostile to the Tamils and believed that Sri Lanka belongs to the Sinhala people only.
(B) India refused to intervene in the conflict, claiming that it was an internal matter of Sri Lanka.
(C) The Indian Peace Keeping Force sent to Sri Lanka in 1967 achieved its objective of establishing peace and stability.
(D) LTTE demanded a separate country for the Tamils of Sri Lanka.

(A) and (D)

The correct answer is Option (4) → (A) and (D)

(A) Sinhala nationalists were hostile to the Tamils and believed that Sri Lanka belongs to the Sinhala people only. (Correct). 
(B) India refused to intervene in the conflict, claiming that it was an internal matter of Sri Lanka. (Incorrect). India did intervene; in 1987, under the Indo-Sri Lanka Accord, it sent the Indian Peace Keeping Force (IPKF).
(C) The Indian Peace Keeping Force sent to Sri Lanka in 1967 achieved its objective of establishing peace and stability. (Incorrect). The IPKF (1987–1990) did not succeed in establishing peace and faced resistance from the LTTE.
(D) LTTE demanded a separate country for the Tamils of Sri Lanka. (Correct)