MCQOPTIONS
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				| 1. | 
                                    Following are the wavelength bands used in optical communication systems.(a) Long (L) Band(b) Conventional band (C band)(c) Extended band (E band)(d) Original band (O-band)Arrange them in increasing order of wavelengths. The correct sequence is: | 
                            
| A. | (d), (c), (b), (a) | 
| B. | (c), (b), (a), (d) | 
| C. | (b), (c), (a), (d) | 
| D. | (a), (b), (c), (d) | 
| Answer» B. (c), (b), (a), (d) | |