Which of the following is an instructional device in which the message can be heard as well as seen?

Environmental Protection Act was enacted in the year

Deficiency of Vitamin A causes

The formula for Ethane is

The spectral bands used in Greenness Vegetation Index are (A) Red (B) Blue (C) Green (D) NIR (E) MIR
Choose the correct answer from the options given below:

The building units of oligosaccharides and polysaccharides are

The consumption of water containing high levels of nitrate–N can lead to

Emissivity of a black body is

The common table sugar is

The WHO standard of drinking water for nitrate is