The correct answer is B. 1 and 3.
Statement 1 is correct. Trinitrotoluene (TNT) is one of the most common explosives for military and industrial application. It is a yellow, crystalline solid with a melting point of 80.5 °C. TNT is a powerful explosive that is used in a variety of applications, including military munitions, mining, and construction.
Statement 2 is incorrect. The main use of aniline is in the production of azo dyes. Aniline is a colorless, oily liquid with a characteristic odor. It is a versatile chemical that is used in a variety of applications, including the production of azo dyes, pharmaceuticals, and plastics.
Statement 3 is correct. Azodyes play an important role as colouring agents in the textile, food and pharmaceutical industry. Azodyes are a class of dyes that are formed by the coupling of two diazonium salts. They are typically used to color textiles, but they can also be used to color food and pharmaceuticals.
In conclusion, the correct answer is B. 1 and 3.