Which one of the following statements is NOT correct?

1. The question asks to identify the statement that is NOT correct. 2. Option (A) states Ali Mardan Khan introduced the system of revenue farming (Ijarah) in Bengal. Ali Mardan Khan was a noble under Shah Jahan, known for engineering canals, primarily active in Punjab/Northwest. The introduction of widespread revenue farming in Bengal is more associated with Murshid Quli Khan in the early 18th century. Thus, this statement is likely incorrect. 3. Option (B) states Maharaja Ranjit Singh set up modern foundries to manufacture cannons at Lahore. This is correct. Ranjit Singh modernized his army with European help and established ordnance foundries in Lahore. 4. Option (C) states Sawai Jai Singh of Amber had Euclid's 'Elements of Geometry' translated into Sanskrit. This is correct. Sawai Jai Singh II was a great patron of science and astronomy and commissioned translations of several works, including Euclid's Elements. 5. Option (D) states Sultan Tipu of Mysore gave money for the construction of the idol of Goddess Sarda in the Sringeri temple. This is correct. Tipu Sultan maintained relations with the Sringeri Sharada Peetham and provided funds for reinstalling the idol after the temple was damaged during a Maratha raid. 6. Since statements B, C, and D are correct, the incorrect statement must be (A). The official answer is (A).