Silver nitrate solution is used to study
(a) Endoplasmic reticulum
(b) Golgi apparatus
(c) Nucleus
(d) Mitochondria
Explanation: Golgi apparatus was discovered by Camillo Golgi using black reaction. Here, the cells are stained in a weak silver nitrate solution which is particularly valuable in tracing the processes and most delicate ramifications of cells. Hence, (b) is the correct option.