Which of the following is a Sanger‚Äö√Ñ√∂‚àö√ë‚àö¬•s reagent?$

Which of the following is a Sanger‚Äö√Ñ√∂‚àö√ë‚à�

1.	Which of the following is a Sanger‚Äö√Ñ√∂‚àö√ë‚àö¬•s reagent?$
A.	1-fluoro-2, 4-dinitrobenzene
B.	1-fluoro-2, 3-dinitrobenzene
C.	1-fluoro-2, 4-trinitrobenzene
D.	1-fluoro-2, 3-trinitrobenzene
Answer» B. 1-fluoro-2, 3-dinitrobenzene