ANGLE OF CONTACT

is it c ??

yaar my techer told me its a

bt in books c is givn

its c i s'pose

for concave angle of contact is less than 90°and for convex angle of contact is greater than 90°.
for a 90° angle of contact adhesive force must be equal to cohesive to cancel out each others effect, since midway of obtuse and acute is 90 hence midway of adhesive > cohesive and cohesive > adhesive must be adhesive = cohesive which correspomds to 90° angle
so i thnk the answer shuld be (c)..

DID UR TEACHER GIVE ANY EXPLANATION FOR HIS ANSWER.[7]

if liq nt rising or fallng

Fa=Fc''(component of Fc)

therefore Fc >Fa

maybe this will help