In light reaction, plastoquinone facilitates the transfer of electrons from :

1. Cytb₆f complex to PS-I

2. PS-I to NADP⁺

3. PS-I to ATP synthase

4. PS-II to Cytb₆f complex

The products of light reaction in photosynthesis are: 
1. ATP, NADPH and \(O_2\)
2. ATP, NADPH, \(O_2\) and \(H_2O\)
3.   ATP, NADPH , and \(H_2O\)
4.   ATP, NADPH ,  and \(CO_2\)