The carbon atom (C) is one of the most important atoms in biological molecules. Several roperties of this “atom make it suitable for life on earth. 

Which of the following statements are true? 

I. Carbon-carbon bond energy is higher than the energy of visible spectrum of light. 

ii. Carbon-nitrogen bonds can be broken by UV light spontaneously. 

iii. Each hydrogen bond in water is stronger than the carbon-carbon covalent bond. 

iv. Carbon-hydrogen bond can be broken by infra red light spontaneously. 

(a) i & ii 

(b) i & iii 

(c) ii & iv 

(d) i, ii & iv