Order of acidity of marked hydrogens in given compounds

1. A.
2. B.
3. C.
4. D.

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1. A.
   $H_{C} > H_{A} > H_{D} > H_{B}$
2. B.
   $H_{D} > H_{C} > H_{B} > H_{A}$
3. C.
   $H_{C} > H_{D} > H_{B} > H_{A}$
4. D.
   $H_{C} > H_{D} > H_{A} > H_{B}$

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1. A.
   C $<$ D $<$ B $<$ A
2. B.
   A $<$ B $<$ C $<$ D
3. C.
   A $<$ B $<$ D $<$ C
4. D.
   $D < C < B < A$

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1. A.
   D
2. B.
   A
3. C.
   B
4. D.
   C

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