A network of power lines that evacuates electricity from a generating station and operates in a narrow frequency band is known as-

നിശ്ചിതവ്യാപ്തമുള്ള ഘനരൂപങ്ങളില്‍ ഏറ്റവും കുറഞ്ഞ ഉപരിതല വിസ്തീര്‍ണ്ണം ഏതിനാണ്?

The rarest metal is:

Diabetes is caused due to the malfunctioning of

The most important part of a plant is

Which is the most chemically active element?