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If the angle of elevation of a cloud from a point \( \mathrm{h} \mathrm{m} \) above a lake is \( \alpha \) and angle of depression of its reflection in the
W take is \( \beta \). Then the height of the cloud is
(a) \( \frac{h(\tan \beta+\tan \alpha)}{\tan \beta-\tan \alpha} \mathrm{m} \)
(b) \( \frac{h(\tan \beta-\tan \alpha)}{\tan \beta+\tan \alpha} \mathrm{m} \)
(c) \( \frac{h \tan \beta+\tan \alpha}{\tan \beta-\tan \alpha} \)
(d) \( \frac{h \tan \beta-\tan \alpha}{\tan \beta+\tan \alpha} \)
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