Which of the following act as acid in sulphuric acid?
(A) HNO3
(B) H2PO4
(C) Water
(D) HClO4
Which of the following act as acid in sulphuric acid?
(A) HNO3
(B) H2PO4
(C) Water
(D) HClO4

Let S={x:x belongs to R(√3+√2)^(x^2-4) - (√3-√2)^(x^2-4)=10}. Then n(S) is equal to-
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