A

Step 1: Understand the definitions of cohesive and adhesive forces.
Cohesive force (C.F.) refers to the forces of attraction between like molecules, whereas adhesive force (A.F.) refers to the forces of attraction between different types of molecules.
Step 2: Analyze the behavior of a water drop in oil. A water drop takes the shape of a sphere due to high cohesive forces among water molecules, which dominate the adhesive forces between water and oil.
Step 3: Analyze the behavior of an oil drop in water. An oil drop spreads in water because the cohesive forces in oil are weaker compared to the adhesive forces between water and oil.
Step 4: Compare the given options. Option A correctly states that the cohesive forces for water are greater than the adhesive forces between water and oil, which explains the spherical shape of the water drop.
Therefore, the correct answer is A.