which statement is true

Detailed Solution:

both A and B are true , this is due to reason that the viscous forces in a fluid are due to cohesive forces and molecular momentum transfer. In liquid the cohesive forces predominates the molecular momentum transfer, due to closely packed molecules and with the increase in temperature, the cohesive forces decreases with the result of decreasing viscosity. But in of gases the cohesive forces are small and molecular momentum transfer predominates. With increase in temperature, molecular momentum transfer increase and hence viscosity increases.