[" Which of the following function is penodic with fundamental period "pi" ? "],[" (A) "f(x)=cos x+[(sin x)/(2)" ; where "[.]" denotes greatest integer function "],[" (B) "g(x)=(sin x+sin7x)/(cos x+cos7x)+|sin x|],[" (C) "h(x)={x}+|cos x|;" where "{" - "],[" (D) "phi(x)=|cos x|+ln(sin x)]