MCQ
Which of the following pair is $C_2$ -epimer ?
- A$D-$ Glucose, $D-$ Maltose
- ✓$D-$ Glucose, $D-$ Mannose
- C$D-$ Allose, $D-$ Ribose
- D$D-$ Glucose, $D-$ Arabinose

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Statement $II :$ As the size of the elements $\mathrm{F}, \mathrm{Cl}, \mathrm{Br}, \mathrm{I}$ increases down the group, the bond strength of $\mathrm{HF}$, HCl, HBr and HI decreases and so the acid strength increases.
In the light of the above statements, choose the correct answer from the options given below.