Which of the following practices involve green chemistry ?
(i) Substitute CFCs by environmental friendly HFCs and other compounds
(ii) Replace halogenated solvent by liquid `CO_(2)` for drycleaning ,
(iii) Use of `H_(2)O_(2)` for bleaching instead of `Cl_(2)`
(iv) Use of tamarind seeds to clean municipal and industrial waste water.
A. (i) and (ii) only
B. (ii) and (iv) only
C. (iii) and (iv) only
D. (i),(ii),(iii)and (iv)