Questions

The main use of salt in the diet is to produce in small amounts the hydrochloric acid required for the digestion of food.

King Abdul Khalid is the largest of all the Airports.It is situated in Riyadh ,Saudhi Arabia

Axons make up a majority of the matter in a nerve is the one statement regarding nerves is incorrect.

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.

In a cached system, the base addresses of the last few referenced pages is maintained in registers called the TLB that aids in faster lookup. TLB contains those page-table entries that have been most recently used. Normally, each virtual memory reference causes 2 physical memory accesses- one to fetch appropriate page-table entry, and one to fetch the desired data. Using TLB in-between, this is reduced to just one physical memory access in cases of TLB-hit.