Taq polymerase is the preferred DNA polymerase in PCR because:

The correct answer is Option (3) → It remains active during high temperature.

In every PCR cycle the DNA is heated to separate its two strands (step A). An ordinary DNA polymerase would be destroyed by this heat and would have to be added again in every cycle.

Option (1) It is obtained from a fast breeding bacteria. — Incorrect. The speed of breeding of Thermus aquaticus does not matter in PCR; the enzyme is used outside the cell.

Option (2) It can bind with the primers efficiently. — Incorrect. Primers bind to the template DNA, not to the enzyme. Any DNA polymerase extends a primer.

Option (3) It remains active during high temperature. — Correct. It is thermostable, so it survives the denaturation step of every cycle.

Option (4) It has high turnover rate. — Incorrect. NCERT gives heat stability, not speed, as the reason for using it.

NCERT Extract:
Amplification of Gene of Interest Using PCR – “… If the process of replication of DNA is repeated many times, the segment of DNA can be amplified to approximately billion times, i.e., 1 billion copies are made. Such repeated amplification is achieved by the use of a thermostable DNA polymerase (isolated from a bacterium, Thermus aquaticus), which remain active during the high temperature induced denaturation of double stranded DNA.”