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A line in the 3 - dimensional space makes an angle $\;\theta (0 < \theta < \large\frac{\pi}{2})\;$ with both the x and y axes . Then the set of values of $\;\theta \;$ is the interval :

$(a)\;(0, {\large\frac{\pi}{4}}] \qquad(b)\;[\large\frac{\pi}{6}, {\large\frac{\pi}{3}}] \qquad(c)\;[\large\frac{\pi}{4}, {\large\frac{\pi}{3}}]\qquad(d)\;(\large\frac{\pi}{3}, {\large\frac{\pi}{2}}]$

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