A small drop is formed using a dropper over a clean solid surface, then which of the following s...

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A small drop is formed using a dropper over a clean solid surface, then which of the following statement(s) is/are correct?
Where, \( S_{l a}= \) surface force of liquid and air, \( S_{s a}= \) surface force of solid and air and \( S_{l s}= \) surface force of liquid and solid.
(a) If \( S_{L s}S_{l a} \), then angle of contact is less than \( 90^{\circ} \).
(b) If \( S_{l s}S_{l a} \), then angle of contact is equal to \( 90^{\circ} \).
(c) If \( S_{l s}S_{l a} \), then liquid spreads over solid surface.
(d) If \( S_{l s}S_{l a} \), then liquid does not spread on solid surface.
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