Which of the following is odd one out?

Cycle dynamo converts

Which of these connected in parallel in a circuit will produce undamped oscillations?

Which of the following statements are correct?
In an isothermal process,
(а) the temperature of the gas remain constant
(b) the gas does not take any heat from the surroundings
(c) the internal energy of the gas remains constant
(d) the pressure and volume of the gas remain constant

Match the following blood pigment with their colour
Pigment Colour
(a) Haemoglobin I. Green
(b) i Hemocyanin 2. Red
(c) Chlorocronin 3. Brown
(d) Pinnoglobin 4. Blue
(a) (b) (c) (d)

Consider the following statements.
Assertion (A) : A drinking expectant mother can harm the embryo.
Reason (R) : The alcohol can pass directly into the blood stream of the fetus.

Photochemical smog is formed by

CD-ROM is a

Transfer of a file from a server to your computer is called

Match List I and List II and select the correct answer using the codes given below:
List I List II
(a) Troposphere 1. Ultra violet rays
(b) Stratosphere 2. Radiowaves
(c) Ozonosphere 3. Movement for jet planes
(d) Ionosphere 4. Weather changes
(a) (b) (c) (d)