Questions

The water rise in a capillary tube dipped in water is such that the weight of water in the tube above the surface of water in the vessel is equal to (balances) the upward force due to surface tension. So it is clear that if the the bore (radius) to the tube is decreased, the height of the water column in it must be greater.  So, (a) is correct.

According to the rules and regulations of cricket, the height of the stumps must be of 28 inches or 71.12 cms. The total distance between the off stump and leg stump should be 9 inches or 22.86 cms. 1. Width and pitching. Two sets of wickets shall be pitched opposite and parallel to each other at a distance of 22 yards/20.12 meters.

Benjamin Franklin has long been credited with the invention of bifocal lenses and he was the first to wear bifocal lenses. He did not produce them himself but instead had some optician in London or France make them for him to overcome Presbyopia, a condition that Franklin suffered. He was tired switching between lenses for far and near sightedness. And that resulted in inventing Bifocal Lenses.