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(B) For a hydrophilic surface, the contact angle at the water-solid interface is less than $90^{\circ}$, i.e., $ < 90^{\circ}$.This occurs because the

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$ < 90^{\circ}$

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(B) For a hydrophilic surface, the contact angle at the water-solid interface is less than $90^{\circ}$, i.e., $ This occurs because the adhesive force between the liquid molecules and the hydrophilic surface is significantly stronger than the cohesive forces within the liquid.As a result, the liquid tends to spread over the surface, leading to a contact angle of less than $90^{\circ}$.

$A$ hydrophilic surface is characterised by the contact angle at the water-solid interface. The value of the contact angle should be:

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