Identify the incorrect statements from the following.

DNA has four bases Adenine, Cytosine, Guanine, Uracil

The correct answer is option 2. DNA has four bases Adenine, Cytosine, Guanine, Uracil.

The statements are:

1) Pentose sugar in DNA is β-D-2-deoxyribose: This statement is correct. DNA does contain β-D-2-deoxyribose as its pentose sugar molecule.

2) DNA has four bases Adenine, Cytosine, Guanine, Uracil: This statement is incorrect. DNA contains four bases - Adenine (A), Thymine (T), Cytosine (C), and Guanine (G). Uracil (U) is found in RNA, not DNA.

3) Two strands of DNA are complementary to each other: This statement is correct. The two strands of DNA in a double helix are held together by specific base pairing: Adenine (A) always pairs with Thymine (T), and Cytosine (C) always pairs with Guanine (G). This complementary base pairing is crucial for DNA replication and gene expression.

4) DNA fingerprinting is used to identify racial groups to rewrite biological evolution: This statement is correct. DNA fingerprinting is a powerful tool used in forensic science and paternity testing, but it cannot be used to identify racial groups or rewrite biological evolution. Race is a social construct with no basis in genetics, and DNA fingerprinting cannot determine an individual's race.

Therefore, the only incorrect statement is (2) DNA has four bases Adenine, Cytosine, Guanine, Uracil.