Correct option is (C) 0
\(\sqrt[4]{81}-8\times\sqrt[3]{216}+15\sqrt[5]{32}+\sqrt{225}\)
\(=(3^4)^\frac14-8\times(6^3)^\frac13+15(2^5)^\frac15+(15^2)^\frac12\)
\(=(3)^{4\times\frac14}-8\times(6)^{3\times\frac13}+15(2)^{5\times\frac15}+(15)^{2\times\frac12}\)
\(=3-8\times6+15\times2+15\)
= 3 - 48 + 30 + 15
= 48 - 48 = 0
