Question

Find out the odd one:
(a) Bio-alcohol, green diesel, bio-ethers, petroleum
(b) Cholera, typhoid, scabies, dysentery

Answer 1

a. Petroleum is the odd one as it is fossil fuel while rests are biofuels. Fossil fuel is the decaying product of biological origin and biofuel is the metabolic product of the biological origin.
b. Scabies is the odd one as rest three are water-borne diseases. Scabies is a mite-borne disease that is contagious, spread by contact.